Individuals & Societies for the IB MYP 4&5: By Concept

Individuals & Societies for the IB MYP 4&5: By Concept

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• Objective: These resources aim to help teachers create outstanding lessons and encourage students' development, progress, and achievement in "Individuals & Societies for the IB MYP 4&5."
• L.e.s.s.o.n Builder Tool Features:
  • Creation, organization, and editing of lessons.
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• Resource Integration: Teachers can combine their own trusted materials with a wide array of informative, exciting, and interactive resources from "Individuals & Societies for the IB MYP 4&5," such as:
  • Unit planners for each chapter, including teaching notes and guidance for learning extension and enrichment.
  • PowerPoint presentations for introducing topics.
  • Summative assessment tasks for every unit/chapter, accompanied by task-adapted assessment rubrics.
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  • MYP Sciences Key Skills student worksheets.

Whiteboard eTextbooks

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Content Authors

• Andy Dailey
• Danielle Farmer
• Emily Giles
• Robbie Woodburn

Author Acknowledgements

• Andy Dailey: Dedicated to the memory of his parents, Shirley Angela Burress Dailey (1948–2017) and Charles Kenneth Dailey (1942–2018). Special thanks to Kareem Almusharaf for invaluable assistance.
• Danielle Farmer: Expresses gratitude to her husband Rob for his support with their children during the writing process. Also thanks the Hodder publishing team and project manager Estelle for their consistent efforts.
• Emily Giles: Dedicated in loving memory of her mother, Aagje Giles Creutzberg.
• Robbie Woodburn: Thanks his father and mother for their love and unwavering support. Hopes the text inspires students to pursue further inquiry-based learning on the introduced topics.

Publishing Information

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• Copyright: © Andy Dailey, Danielle Farmer, Emily Giles, Robbie Woodburn 2020.
• Publisher: Hodder Education, an Hachette UK Company, Carmelite House, 50 Victoria Embankment, London EC4Y 0DZ.
• Impression Numbers: 5 4 3 2 1 (Years: 2023 2022 2021 2020).
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• Printed In: Slovenia.
• Catalogue Record: Available from the British Library.
• ISBN: $9781510425798$ (appears to be a typo and should be $ISBN 9781510425798$)

Table of Contents

• Chapter 1: Why do individuals form social groups? (Page 2)
• Chapter 2: Why are empires formed? (Page 26)
• Chapter 3: How do empires work? (Page 46)
• Chapter 4: How do empires fall? (Page 80)
• Chapter 5: What impact do humans have on natural environments? (Page 110)
• Chapter 6: How does population change affect individuals and societies? (Page 144)
• Chapter 7: Can urban systems and environments be managed sustainably? (Page 168)
• Chapter 8: How do we decide what to produce? (Page 188)
• Chapter 9: Can we make a fairer world through trade? (Page 218)
• Chapter 10: How can developing countries successfully increase standards of living? (Page 244)
• Chapter 11: Is our exploitation of the Earth sustainable? (Page 264)
• Chapter 12: How has our perspective changed now? (Page 294)
• Glossary: (Page 310)
• Acknowledgements: (Page 314)
• Index: (Page 316)

Chapter 1: Why do individuals form social groups?

• Statement of Inquiry: Individuals can change the world they inherit, but to do so they must understand how human societies and environments depend on each other.
• Key Concept: Time, place and space
• Related Concepts: Culture; Identity; Perspective
• Global Context: Orientation in space and time
• Inquiry Questions:
  • Factual: What is equality?
  • Conceptual: Why do people form social groups? How does the structure of social groups promote the participation of individuals? How and why do social groups behave in a similar way? What impact do social groups have on the sustainability of resources? How does culture shape individuals and their societies? What role has social media played in shaping society? How do we study Individuals and Societies?
  • Debatable: Why is it important to explore different cultures?
• Chapter Objectives:
  • Find out about the ways we study Individuals and Societies.
  • Explore concepts that help explain the relationships between individuals and societies.
  • Take action by discussing how our society has changed in positive and negative ways.
• Key Words: culture, judicial system, penal system, society.
• Approaches to Learning (ATL) Skills: Communication, Information literacy, Critical-thinking, Creative-thinking.
• Learner Profile Attribute: Thinkers – thinking critically and creatively about the role of individuals in social groups.
• Assessment Opportunities: Criterion A: Knowing and understanding; Criterion B: Investigating; Criterion C: Communicating; Criterion D: Thinking critically.

How to Use This Book

• Series Design: Each chapter is crafted to guide students through an inquiry into the concepts of Individuals and Societies and their interaction within real-life global contexts.
• Inquiry Framework: The Statement of Inquiry provides the overarching framework, and Inquiry questions (factual, conceptual, debatable) guide the exploration throughout the chapter.
• Vocabulary: Key words are included to build vocabulary. Glossary terms are highlighted, and search terms are provided for independent research.
• Activities: Designed to develop Approaches to Learning (ATL) skills. Some are formative for practicing assessment objectives, while others can be summative for assessing achievement against all parts of an objective.
• Hints: Provided in some activities to assist with assignments, also introducing the new Hint feature in on-screen assessments.
• Chapter Framing: Each chapter is framed with a Key concept, Related concept, and Global context. Definitions for important terms and information boxes for background details are included.
• Active Learning: Students are encouraged to be active participants in the learning process. Guidance is given for research, forming research questions, and linking topics to 21st-century global issues.
• Take Action: Activities that prompt students to consider ethical, philosophical, or practical implications and take action.
• Extension Activities: Allow for deeper exploration of topics.
• Links to Other Subjects: Connections to other subject disciplines are discussed.
• IB Learner Profile: Each chapter features an IB learner profile attribute for reflection.
• Reflection Table: At the end of each chapter, a table encourages reflection on learning, answers found, and new questions.
• Conceptual Understanding: Promotes conceptual understanding through various activities.
• Visible Thinking: Incorporates Visible Thinking routines (ideas, framework, protocol) from Project Zero at the Harvard Graduate School of Education.

Why Do Individuals Form Social Groups?

• Evolutionary Basis: Archaeological evidence suggests Homo sapiens has been a 'social animal' for at least $300,000$ years. Evolutionary biology implies inherited behaviors that provide an advantage, such as living in groups.
• Maslow's Hierarchy of Needs: Abraham Maslow developed this psychological model in the 1940s and 1950s to understand human motivation.
  • Basic Needs: Survival and safety (food, water, warmth, rest) were challenging for early ancestors.
  • Psychological Needs: Once basic needs are met, higher-level needs emerge, such as the desire for acknowledgment and fulfillment, motivating social interaction.
  • Critique: The hierarchical model implies some needs must be met first. However, social interaction is crucial even for basic survival.
• Benefits of Social Groups: Allow individuals to meet needs in Maslow's hierarchy by working together to find food, ensure safety, provide a sense of belonging, and allow individuals to feel important in shaping their and the group's future.
• Limitations of Social Groups: May constrain individual behavior to maintain group stability and functionality, leading to the development of control mechanisms.

How Does the Structure of Social Groups Promote the Participation of Individuals?

• Durkheim and the Size and Complexity of Social Units: Emile Durkheim, an early sociologist, studied social group formation, change, and individual interaction.
  • Causes for Change: Changing population density (leading to greater physical proximity) and technology (altering communication) are main drivers of change.
  • Moral Density: Refers to the way and frequency of people's interactions.
  • Mechanical Solidarity: Characterizes small, closely-knit groups (e.g., ancient nomadic communities). Individuals share similar behaviors, attitudes, beliefs, often derived from shared religious systems and strong kinship ties. They perform multiple functions and share workloads to meet basic needs.
  • Organic Solidarity: Develops in larger groups (towns and cities) with increased moral density. Individuals are less similar, perform specialized tasks, and live more separately. Religious systems and kinship become less important, and individuals exercise more free will. Formal structures like judicial and penal systems are necessary to maintain harmony.
• Economic Systems for Allocating Scarce Resources: Given finite resources and limitless human wants/needs, societies must allocate resources among competing uses.
  • Small Groups: Resource allocation is simpler due to communal organization and shared needs.
  • Complex Societies: Require different systems due to individualism and lack of collective work. Four broad categories include:
    • Slavery: Most violent system. Individuals are deprived of freedom and forced to work for an owner (e.g., Jewish people in Ancient Egypt, African slaves in the British Empire). Used for domestic service, crop production, construction.
    • Feudalism: Predominant in Medieval Europe, Russia (until 1861), and Japan (until 1868). Based on hereditary rule and land ownership. Monarchs and landowners managed agricultural production and some manufacturing. Peasants/serfs were tied to the land, working for landowners with few rights, lacking freedom to move or education for advancement.
    • Capitalism: Dominant global economic system today. Ownership of capital rather than land. Capitalists employ workers to transform raw materials into goods/services with exchange value. Most people work for businesses initiated and invested in by capital owners.
      • Critics: Philosophers like Adam Smith acknowledged self-interest as a driver. Later critics like Pierre-Joseph Proudhon, Pyotr Kropotkin, Karl Marx, and Friedrich Engels viewed it as oppressive as slavery or feudalism.
      • Marxist View: Production for trade/exchange forces workers into a relationship with owners of production means. Workers earn wages to buy necessities instead of producing their own. Marx saw this as alienation, where work denies essential being and leads to unhappiness, mortifying the body and ruining the mind. Workers are 'at home when not working, and when working he is not at home.'
      • Worker Power: Marx argued that laborers (owners of their labor power) are essential for capitalists to create value from resources. Predicted worker uprising against capitalists due to competition lowering wages. Advocated for no private property under communism, with surplus value shared by all citizens.
    • Communism: No private property; surplus value generated shared by all citizens. (Historical note: While Marx and Engels outlined the theory, no country fully realized the 'withering away' of the state).

What Is Equality?

• Definition: Equality generally means everyone in society earns the same, or no discrimination based on gender (gender equality). Equity, by contrast, means fairness.
• "Utopia for Realists" Perspective (Rutger Bregman):
  • Historical Wretchedness: For 99% of history, 99% of humanity was poor, hungry, dirty, afraid, stupid, sick, and ugly (Pascal, Hobbes cited).
  • Recent Change: Over the last $200$ years, billions have become rich, well-nourished, clean, safe, smart, healthy, and occasionally beautiful. Extreme poverty fell from $84\%$ in $1820$ to $44\%$ in $1981$, and now under $10\%$. This trend suggests a potential eradication of extreme poverty.
• Activity: How equal do we want the world to be?:
  • Cornell Note-Taking Method: Divide page into a recall column (left, for headings/questions) and a notes column (right, for notes/answers). A short summary is written at the bottom. This method promotes active learning and self-testing.
  • Dan Ariely TED Talk: "How equal do we want the world to be?" (www.ted.com/talks/)
    • Questions to address: Role of 'preconceived notions and expectations' in shaping perspectives; measurement of wealth inequality using percentage shares; definition of 'knowledge gap'; John Rawls's contributions; definition of 'desirability gap'; differences in results across groups; lessons learned from research.
• The Role of Income Taxes:
  • Direct Taxation: Most countries tax income to redistribute wealth and fund essential services.
  • Progressive Tax System: Higher income earners are taxed at a higher rate. This is a contested topic due to confusion between marginal and average tax rates.
  • Marginal Tax Rate: Tax rate paid on income within a specific tax bracket.
    • Example (Australia 2018/19): Income $\$0-\$18,200$ (0% tax); $\$18,201-\$37,000$ (19% on income over $\$18,200$); $\$37,001-\$90,000$ ($\$3,572$ + 32.5% on income over $\$37,000$), etc.
    • Calculation Example: Earning $\$30,000$: $(0 \times \$18,200) + (0.19 \times \$11,800) = \$2,242$ . Average tax rate: $(\$2,242 / \$30,000) \times 100 = 7.47\%$ .
    • Implication: Average tax rate is always lower than the quoted marginal rate. A pay rise to a new bracket means only the income within that new bracket is taxed at the higher marginal rate.
  • Links to Mathematics: Calculating income tax rates involves mathematical skills.
• Meet a Significant Individual: Dan Ariely (1967–Present):
  • Background: Israeli economist, behavioral economics professor at Duke University. Suffered severe burns as a child, leading him to question how patients cope with pain.
  • Research Focus: Expanded studies to decision-making and behavioral economics, realizing its relevance to financial decisions, health, habits, and personal life.
  • Works: Author of "Dollars and Sense," "Predictably Irrational," "The Upside of Irrationality," and "The Honest Truth about Dishonesty" (documentary on Netflix).
• The Future of the Workforce and Automation:
  • Historical Context: Since the Industrial Revolution, mechanization has increased productivity and economic growth but also caused investment booms followed by busts and job obsolescence (e.g., coal-fired engines, steel, telecommunications, internet).
  • Technology Surges: Carlota Perez's work (1939–Present) suggests economic growth follows approximately $50$-year waves driven by new technology or institutional frameworks. We are currently in the installation period of a tech wave that has burst.
  • Sustainable Future: Perez argues a positive outlook for the current wave requires significant global investment in sustainable technology.
• Activity: The case for a universal basic income:
  • Concept: A guaranteed minimum payment to everyone, designed to support low-income earners and allow unemployed workers time to find new jobs.
  • John Maynard Keynes (Excerpt from "The Economic Possibilities for our Grandchildren," 1930): Envisioned a future where economic necessity is practically removed for larger groups. Advocated for valuing 'ends above means' and preferring 'the good to the useful.' Warned against avarice and usury but noted they were temporarily necessary to exit 'economic necessity.' Believed progress would be gradual, requiring control over population, avoidance of wars, trust in science, and balance between production and consumption.
  • "Basic income could work – if you do it Canada-style" (MIT Technology Review, 2018): Describes a three-year pilot in Ontario where $4,000$ people received monthly stipends (e.g., $\$17,000$ CAD for singles) boosting them to $75\%$ of the poverty line. Participants reported improved well-being, ability to buy fresh food, and increased social interaction.
  • "Universal basic income wouldn’t guarantee that work pays, finds study" (Helsinki Times, 2019): A Finnish Ministry of Finance study found a budget-neutral UBI (e.g., $€700$/month) would only marginally reduce poverty. Tax hikes to fund it would negate increased profitability of work. Beneficiaries would be low-income earners, business owners, and those without income from capital. Hurts middle/high-income groups. Could alleviate bureaucratic traps.

How and Why Do Social Groups Behave in a Similar Way?

• Norms and Values: All social groups establish expectations for behavior and systems of consequences for deviations.
  • Religion's Role: Historically, religion often shaped interactions (e.g., Confucius in China, Christianity in Europe, Islam in the Middle East).
  • Governing Systems: Religions have long been linked to governance. Many countries still have state religions, using faith laws to influence national laws. Others have secular legal systems evolved from religious values.
  • Legal Systems: Whether religious or secular, legal systems set behavioral standards and clarify acceptable conduct, ensuring group survival and prosperity. The philosophy studying values is referred to as normative ethics.
• Culture: A concept encompassing shared ideas, actions, principles, beliefs, and values.
  • E.B. Tylor's Definition (from "Primitive Culture," 1871): "that complex whole which includes knowledge, belief, art, law, morals, custom, and any other capabilities and habits acquired by man as a member of society."
  • Individuality: Modern emphasis on individuality and diverse views is a relatively recent development in human history.
  • Cultural Diffusion: The spread of cultural ideas from their origin to other regions, groups, or nations, driven by globalization. This can lead to cultural homogenization (e.g., global transnational companies adapting to local styles) or diversification by increasing choice.
    • Glocalization: The practice of expanding business models globally while maintaining local considerations (e.g., McDonald's menus).
    • Threat to Language: Cultural diffusion can threaten minority languages (e.g., Icelandic battling 'digital extinction' due to English dominance).

What Role Has Social Media Played in Shaping Society?

• Globalization's Impact: Globalization means increasing similarity in social and cultural influences on goods and services bought and sold worldwide.
• Social Media's Importance (21st Century): Crucial for public relations (PR) for almost all businesses due to surging public accessibility to technology.
  • Market Expansion: Rapid increase in potential markets, creating new opportunities and challenges in PR.
  • Platform Use: Companies use platforms like Facebook, Twitter, Instagram to display profiles, advertise products/events/services, gather feedback, and encourage referrals/follows.
• Social Media Influencers: Used in marketing to build relationships with individuals who can then leverage their social media following to build relationships for companies.
  • Impact: Influencers (regardless of audience size) reach consumers via blogs and posts that companies might not otherwise access.
  • Earnings Example (2018 Instagram Rich List): Kylie Jenner: estimated $\$1$ million per sponsored post. Selena Gomez: $\$800,000$. Cristiano Ronaldo: $\$750,000$.
• Activity: Is social media a force for good?:
  • Debate: Divide class into two groups to debate whether social media is a force for good.
  • Arguments For: Improved democracy (transparency, access to information), new economic growth opportunities.
  • Arguments Against: Rise of fake news and echo chambers, increased pressure (fear of missing out, body image issues), lost self-confidence.

What Impact Do Social Groups Have on the Sustainability of Resources?

• Population Pressure: World population reached $1$ billion by $1800$ and grew to over $7$ billion since, placing immense pressure on natural resources.
• Sustainability Definition: Introduced by the Brundtland Report in $1987$ as "development that meets the needs of the present without compromising the ability of future generations to meet their own needs."
• Three Pillars of Sustainability:
  • Environmental Sustainability: Improvements in living standards without long-term environmental damage affecting future generations.
    • Examples: Protecting biodiversity, stopping human-caused climate change, eliminating ozone layer damage, reducing pollution.
  • Economic Sustainability: Inclusive development where everyone has a right to economic improvement; long-term, non-corrupt, avoiding debt.
    • Examples: Access to finance, no corruption, no absolute poverty.
  • Social Sustainability: Inclusive development ensuring improved living standards for all; equal access to healthcare, education, resources; respecting individual cultures.
    • Examples: Freedom of speech, health and safety at work, access to clean water/sanitation, access to basic needs (water, food, shelter, clothing), access to education/healthcare, equality (sexes, religions), right to vote, access to justice, safety, respect for cultures.
• Chapter Connections: Sustainability is a vital consideration explored throughout the book, with Chapters 7 and 10 specifically examining the UN's Sustainable Development Goals in urban systems and economic development.

How Do We Study Individuals and Societies?

• Disciplinary Lenses: Different subject disciplines within Individuals and Societies (humanities or social sciences) study social groups and interactions through distinct lenses (e.g., business management, economics, geography, history, law, politics, psychology, sociology).
• Skills and Techniques: A wide range of skills are crucial for successful study, enabling confident analysis and writing.
• Using Sources:
  • Primary Sources: Created at the same time as the period studied, offering direct links. In economics/business, these can be surveys or interviews. Limitations: Never tell the whole story, necessitate finding multiple sources.
  • Secondary Sources: Created after the period or by non-firsthand witnesses (e.g., historical books, datasets from organizations like IMF). Offer different perspectives and add balance/credibility to analysis. Help understand disputed causes and effects of events.
• Observations: Gained by observing people's interactions in specific areas (e.g., shops, roads). Field trips in geography involve taking and compiling measurements (water speed, silt, rock size).
• Graphical Skills: Present gathered numerical data using graphs to easily visualize patterns and trends. Always use pencil and ruler for hand-drawn graphs. Scatter plots need a line of best fit. Time series data connects dots. All images/charts must have a figure number and title.
• Interpreting Data: A more complex skill than gathering/presenting. Depends on:
  • Quality of Gathering: Economic data (growth, inflation, unemployment) requires extensive procedures and rigor. Inflation measures (e.g., 'basket of typical things') vary regionally, socio-economically, by gender, household size, and over time, making comparisons difficult.
  • Correlation vs. Causation: Data showing a correlated relationship does not necessarily imply a causal relationship (e.g., cheese consumption and deaths by bedsheet tanglings). Econometrics attempts to establish causation using complex statistics.
• Critical Thinking: Enormously important across all subjects. Essential in Individuals and Societies due to limitations of methods (incomplete historical records, differing interpretations, difficulty gathering all information in studies of people, rapidly changing world). Requires awareness of investigation method limitations.
• Building More Sophisticated Reference Lists:
  • Assessment of Sources: Create a table with columns for source name, weblink, strengths, and weaknesses.
  • Questions for Assessment: Credibility; alternative perspectives; range of source types; integration into work.
  • Advice: Use learned insights to improve future work.

Chapter 2: Why are empires formed?

• Statement of Inquiry: Empires are systems of power arising from conflict over resources, creating new identities and relationships.
• Key Concept: Systems
• Related Concepts: Conflict; Power; Resources
• Global Context: Identities and relationships
• Inquiry Questions:
  • Factual: What are common characteristics of empires?
  • Conceptual: What role does the military play in the development of empires? What role can innovation and technology play in the development of empires? What role can economics play in the development of empires? What role can climate play in the development of empires?
  • Debatable: Is empire formation an inevitable part of human history? To what extent can we consider empires a thing of the past?
• Chapter Objectives:
  • Find out some definitions of empire and why empires form, including the factors that led to their formation.
  • Explore the importance of military conquest, the role of technology and innovation, economic reasons for expansion, and the effects of climate change in empire formation.
  • Take action by researching and comparing the formation of two modern multi-ethnic states to historical empires.
• Key Words: conquest, empire, innovation, technology, war.
• Approaches to Learning (ATL) Skills: Communication, Collaboration, Information literacy, Critical-thinking, Creative-thinking, Transfer.
• Learner Profile Attribute: Inquirers – using thinking and research skills to address natural curiosity, developing further knowledge, opportunities for collaboration and love of learning.
• Assessment Opportunities: Criterion A: Knowing and understanding; Criterion B: Investigating; Criterion C: Communicating; Criterion D: Thinking critically.

What Are Common Characteristics of Empires?

• Definition: Empires form when states or countries are ruled by an outside power (another country, small group, or individual). Rulers typically hold titles like king, emperor, sultan, padishah, tennō, doge. They are usually formed through military conquest for glory, financial gain, defense, or cultural/religious reasons benefiting the rulers.
• Economic Domination: Some historians argue empires can also form when one country economically dominates other politically independent states, making them dependent on trade or specific products (e.g., Venice dominating Middle East-Europe trade routes).
• Imperialism: The modern term for the creation and expansion of empire.
• Common Attributes (Shared by empires studied in this chapter, differentiating them from states, federations, allied states, or city-states):
  • Central Authority: All had a central authority (individual or small group) with a capital city (e.g., Memphis, Rome, Damascus, Karakorum). This authority controlled law, military, much of the economy, resource distribution, and sometimes religion.
    • New Kingdom Egypt (1570–1070 BCE): Ruled by the pharaoh (considered the god Horus), who owned everything. Religion and politics were intertwined. Pharaoh controlled all resources, ensuring food and necessities for his worshippers/property. As head of the military, he protected territory and wealth (e.g., gold and copper from the Nile Valley).
    • Imperial Rome (27 BCE–476 CE): Ruled by the emperor (e.g., Augustus, Caesar), but power was often shared with the Roman Senate, provincial governors, military, and wealthy elite. Emperors' authority varied. Rome was the capital, but central authority could shift with the emperor's travels. State control over the economy was partial (e.g., salt, grain, purple dye, marble mining, public building construction by military). Private ownership of businesses and farms was common.

What Role Does the Military Play in the Development of Empires?

• Umayyad Caliphate (661–750 CE):
  • Expansion: Began with Caliph Mu'awiya I. Rapid military expansion from Damascus (Syria) to encompass North Africa, Spain, Portugal, parts of France, Cyprus, Rhodes, Persia, and much of Central Asia. This sheer size resulted in domination of world trade.
  • Military Strategy: Achieved through constant warfare. Expanded army by allowing majority Christian population to join, including a navy almost entirely of Christian sailors. Rapid movement and surprise tactics against enemies (especially across North Africa) were facilitated by military alliances with nomadic Bedouin tribes.
• Mongol Empire (1206–1368 CE):
  • Founder: Established by Temujin (Genghis Khan), who, with his descendants, created the largest land-based empire through military conquests across Asia, the Middle East, Africa, and parts of Europe.
  • Military Strengths:
    • Horses: Allowed rapid movement (up to 160km/day), surprising enemies. Mongols fought from horseback using bows, arrows, swords, lances. Mongol horses fed on grass/twigs, eliminating need for grain supply wagons, increasing mobility.
    • **Composite Bow:
    • Organization: Flexible command structure based on a decimal system (units of 10, 100, 1000, 10,000) could act independently.
    • Weapon Adoption/Innovation: Incorporated and improved weapons from conquered territories (fireworks, siege equipment, gunpowder, cannon).
    • Integration: Conquered soldiers were integrated if useful. Valued translators, engineers, guides. Engineers (non-Mongol) built siege equipment from destination materials.
    • Terror Tactics: Cities that resisted faced intentional destruction and mass killings (e.g., Baghdad in 1258, destroyed with hundreds of thousands killed, serving as a warning).
  • Abbasid Caliphate (750–1258 CE): Overthrown by Umayyads. Capital moved to Baghdad, becoming a center of trade, learning, government. Faced revolts, civil war, domination by governors/tribes/military. Greatest threat was the Mongols, who destroyed Baghdad and annexed its territory.

What Role Can Innovation and Technology Play in the Development of Empires?

• Leveraging New Ideas: Empires often gain advantage through new ideas and technology, acquired via interaction (conquest, invasion, trade, alliance) or local innovation.
• Chariot Warfare (Revolutionized Warfare and Ancient Society):
  • Description: Two-person cart, used with composite bow. Sophisticated vehicle by 1750 BCE, common by 1500 BCE. Lightweight cart pulled by two horses (gallop speed), two spoked wheels (stronger, lighter). Sides made of twined vines/branches. Warriors stood on woven leather platform (light, absorbed shocks). Light enough for one warrior to lift.
  • Composite Bow: Developed before the chariot. Made of special woods, horn, animal parts, glues; took years to assemble. Shot arrows further with improved accuracy than typical bows.
  • Tactics: Mobile shooting platforms. Warriors shot arrows from a distance, then retreated to safety. Pursued fleeing enemies. Used in large numbers (e.g., Egyptian Pharaoh Tuthmosis III and King of Megiddo each deployed ~$1,000$ chariots).
  • Battlefields: Fought in open areas. Allowed allied soldiers/workers to be protected while attacking forts/cities or starving them into surrender.
• Hittite Empire: Capital at Hattusa (central Anatolia, modern Turkey). Major source of iron. Rivals/allies of New Kingdom Egypt; frequently engaged in major chariot battles, recorded in tablets and inscriptions.
• Chariot Warfare in New Kingdom Egypt:
  • Introduction: Appeared suddenly around 1675 BCE with the Hyksos ('Rulers of Foreign Lands'), who used chariots to rapidly control the Nile Valley from Avaris.
  • Egyptian Adoption: Native Egyptian rulers fought against Dynasty 15 for ~$150$ years, adopting chariot warfare.
  • New Kingdom Era: Dynasty 18 established the New Kingdom, creating an empire dominating the Levant, much of Syria, parts of eastern Libya, and Sudan. This protected the central Nile Valley and provided resources (wood, wine, olive oil, gold, ivory, animals).
  • Empire Support: Chariot warfare required expensive, specialized tools (chariots, horses, composite bows) and trained warriors. A new warrior class (several thousand in Egypt) emerged, implying the empire expanded to economically support this class.

What Role Can Economics Play in the Development of Empires?

• New Kingdom Egypt: Expansion driven by economics (e.g., securing resources like wood, wine, olive oil, gold, ivory, animals).
• Roman Empire (27 BCE–476 CE): Large, complex state with vast trading networks and economic needs.
  • Resource Distribution: Some areas had grain abundance, others lacked food. Silver from Spain, olive oil from Eastern Mediterranean, tin from Britain (for bronze). Egypt supplied papyrus. Islands supplied marble. Rome's system facilitated resource sharing.
  • Grain in Egypt: Almost entirely dependent on Egyptian grain. Before 31 BCE, Egypt was independent, supplying Rome at low/no cost for Roman support. Critical during Roman civil wars, as control of grain influenced conflicts. In 31 BCE, Egypt's navy and Roman ally Marcus Antonius were defeated. In 30 BCE, Egypt lost independence, becoming personal property of Octavian Caesar (Augustus).
• Silver and Agriculture in Carthage:
  • Rivalry: Carthage (Mediterranean trading power based in Tunisia) was Rome's main economic competitor. Resulted in three Punic Wars (264–146 BCE).
  • Sicilian Annexation: Sicily (rich agricultural area), controlled by Carthage, was annexed by Rome in 241 BCE, providing $1$ million bushels of free wheat annually. Rome also gained Corsica and Sardinia, controlling Western Mediterranean trade routes.
  • Spanish Silver Mines: Second Punic War (201 BCE) driven by Rome's desire for Spanish silver mines. Carthage defeated, territory limited to North Africa, much of Spain annexed.
  • Third Punic War: Caused by Rome's increased reliance on North African grain and economic rivalry in the Eastern Mediterranean. Rome's victory (146 BCE) led to Carthage's destruction, annexation as a Roman province, and enslavement of its population.

What Role Can Climate Play in the Development of Empires?

• Climate Change Impacts: Can increase rainfall, raise/lower temperatures, shorten/extend growing seasons over long periods, affecting populations.
• Umayyad Caliphate (661–750 CE):
  • Volcanic Eruptions: Three major eruptions (536, 540, 547 CE) sent dust/ash into the atmosphere, causing global cooling and shorter summers until ~$660$ CE. Led to food shortages, disease susceptibility.
  • Weakened Empires: Persian and Byzantine Empires, bordering the early Islamic Caliphate, were devastated by disrupted climate (food shortages, plagues, nomadic invasions), leading to political instability and war. This weakened them, assisting their defeat by the Caliphate.
  • Islamic Caliphate Advantage: Originating in the Arabian Peninsula deserts, the region experienced increased rainfall from 536–660 CE. This meant more grass for camels and horses, supporting a larger, healthier population and larger armies for expansion into weakened Byzantine and Persian territories.
• The Mongol Empire (1206–1368 CE):
  • Mongol Lifestyle: Nomadic people of Asian grasslands, dependent on horses and animals (sheep) for food, milk, leather, dung, hair. Dry summers led to starvation.
  • Climate Change Benefit: From 1211–1227, the Mongol region received greater rainfall, leading to more grass, healthier animals, and a larger, healthier population. Genghis Khan's armies directly benefited from this, expanding the empire.

Is Empire Formation an Inevitable Part of Human History?

• Historical Prevalence: Empires have existed from early human history, some for centuries, others briefly. Their existence has greatly affected human history.
• Causes: Intentionally created through military conquest and political concerns, or formed in reaction to economic needs.
• Debate Activity: Discuss which factor (military, technology/innovation, economics, climate) is most important for empire formation, providing arguments and historical examples.

Chapter 3: How do empires work?

• Statement of Inquiry: Empires are governed by leaders who must control the interactions between different cultures both internally and globally.
• Key Concept: Global interactions
• Related Concepts: Governance; Interdependence
• Global Context: Personal and cultural expression
• Inquiry Questions:
  • Factual: What systems keep empires in place? What are the effects of an empire’s global interaction?
  • Conceptual: How can empires successfully defend themselves from challenges and threats? What factors might be important for maintaining a successful empire?
  • Debatable: To what extent is leadership important in the maintenance of empires? To what extent are empires and modern supra-national organizations and superpowers similar? Can empires successfully accommodate the expression of personal and cultural difference?
• Chapter Objectives:
  • Find out the common challenges faced by some of the world’s empires.
  • Explore the reasons why empires are challenged both internally and externally, and how some empires faced these challenges.
  • Take action by investigating how some states handle internal and external crises today.
• Key Words: alliances, infrastructure, military, military infrastructure, Silk Road, standing armies, tax.
• Approaches to Learning (ATL) Skills: Communication, Collaboration, Information literacy, Critical-thinking, Transfer.
• Learner Profile Attribute: Reflective – thoughtfully considering our own strengths and weaknesses in terms of analytical and debate skills, working to understand our own development as historians, and how our own ideas and experiences are the result of the history of the world around us.
• Assessment Opportunities: Criterion A: Knowing and understanding; Criterion B: Investigating; Criterion C: Communicating; Criterion D: Thinking critically.

What Systems Keep Empires in Place?

• Systems for State Support: Empires develop varied systems to aid government functions, such as trade, communication, and law.
• Government and Bureaucracy:
  • Function: Organizations that operate states and empires. Generally include rulers, officials, laws, law enforcement, and tax collection.
  • Tax Collection: Essential for maintaining empire systems. Taxes collected for thousands of years through time/labor, goods, services, or money.
    • Purpose: Military expenses (salaries, food, equipment, ships, fortifications), construction projects (roads, buildings, canals), salaries for officials (courts, law enforcement, scribes), and future crisis use.
    • Ancient Money: Originally metals/precious materials. First manufactured money (small bronze knives/spades) in China (approx. $1000$ BCE). First coins minted by Kingdom of Lydia (approx. $650$ BCE). Paper money developed by Song Dynasty (960 CE), spread after Mongol invasion of China.
    • Taxation Methods: Taxes on people, families, services/products, land, movement of people/goods (e.g., Roman Empire under Augustus taxed land, homes, wealth, slaves, animals, inheritances).
  • Planning/Record Keeping: All successful empires maintained records for administration: population, soldiers, trade, agriculture, taxes (paid/unpaid), resources (imported/produced), weather/climate reports, infrastructure, diplomacy.
    • Records Enabled: Future planning, tracking current projects, meeting challenges, timely payments, verifying historical information, organized/beneficial relations with other states.
    • Neo-Assyrian Empire (911–609 BCE): Archive discovered in ancient Nimrod (1952) contained letters on army supply, city wall building, battles, population movement, trade, taxes, political decisions. Records kept for over a century, buried upon city destruction.
    • Ming Emperor Hongwu (China): Government records showed insufficient farmers (drought, high taxes, soil erosion). Ordered millions of trees planted, reduced/ended taxes on farmland, constructed ponds/lakes for water storage, excavated irrigation/transportation canals. By end of his rule, more land farmed than ever before.
  • Source Analysis (Augustus's Funeral Inscription): Records can be propaganda. Augustus's inscription on his tomb (and other temples) aimed to portray a specific image of himself to citizens, emphasizing his service to the republic and settling the constitution.
  • Venice (7th–18th Centuries): Republic ruling other lands/cities (Adriatic/Aegean Seas). Built empire through trade domination between Middle East and Europe. Maintained detailed records, especially on interactions with Ottoman Empire (peace treaties, announcements, diplomatic/merchant reports, battle accounts). Used records to manage complex, often conflictual, relationship.
• Law and Law Enforcement:
  • Function: Rules governing interactions between people and government. Based on religion, traditions, or ruler/group decisions. Generally strengthened empires.
  • Systems: Courts and law enforcement developed to ensure compliance.
  • Ur-Nammu Law Code (c. $2100$ BCE): Oldest surviving text of laws from Neo-Sumerian Empire. Over $50$ written laws (30 readable) covering execution for murder, robbery, adultery, rape; fines (silver/grain) for other crimes.
  • Roman Law (Developed during Roman Republic, 509–27 BCE):
    • Twelve Tables: First written laws, basic constitution for citizens: rights/responsibilities, right to trial. Laws on religion, crime, state governance. Later laws had to be consistent.
    • Trials: Roman citizens had right to trial and to accuse others. Specialized courts (e.g., for treason). Lawyers emerged. Citizen juries and magistrates heard arguments, reviewed evidence, made decisions. Magistrates responsible for sentencing.
    • Influence: Roman Empire lasted centuries. Eastern Roman (Byzantine) Empire continued until 1453 CE. Roman law significantly influenced the world. Emperor Justinian I systematized laws into Corpus Juris Civilis (Justinian law code) in 6th century, forming the basis of most European legal systems by 19th century. Many modern legal concepts (trials, juries, judges, precedent, appeals) originated here. Still compulsory for legal degrees globally.
  • Mongol Law (Yassa): Developed by Genghis Khan. Initially oral, managed army behavior/actions. Written versions for royal family only.
    • Focus: Military organization, requirement for Mongols to work together, responsibilities of high-ranking army/royal family members, forbidding attacks on royal family, banning retreat in military, courage in war.
    • Expansion: Later included laws on marriage, adultery, animal/water treatment, inheritance, other military issues, crime/punishments, citizen responsibilities.
    • Purpose: Maintained military strength/unity in diverse, conquered empire. Ensured Mongols retained military prowess.
• Infrastructure:
  • Function: Roads, bridges, dams, canals, public facilities (e.g., grain silos). Bound empire, allowed faster movement of people/goods, stored food to prevent famine.
  • Roads and Bridges: Crucial for many empires, moving people/goods. Some had paved roads (Roman), others path systems (Mongol Silk Road). Bridges crossed water/ravines.
    • Roman Empire (27 BCE–476 CE): Built ~$400,000$ km of roads/bridges by military to connect capital (Rome) with 113 provinces. For military use, goods, civilians, officials. Included way stations, inns, distance markers. Government responsibility, with specific officials for building/maintenance. Some sections (e.g., Via Appia, Via Egnatia) still exist/are used.
    • Inca Empire (1438–1533 CE): Dependent on vast road system (~$40,000$ km), expanded from older routes. For religious/government purposes (state owned all resources). Public needed permission. Qhapaq Ñan (Great Inca Road) was $6,000$ km. Bridges (wood, ropes, stone, rafts) crossed rivers/ravines. Used by chasqui (runners for messages/goods) and pack animals (llamas, alpacas). No wheeled vehicles. Government used roads for supply redistribution, with storage facilities (qullqa) along them for famine/war.
  • Dams and Canals: Managed water resources. Dams prevented floods, created reservoirs for agriculture/other uses during dry seasons. Canals increased agriculture and boat transport.
    • Middle Kingdom Egypt (2055–1650 BCE): Nile River central for irrigation/transport. Canals increased cultivated land. Great Canal (Mer-Wer) linked Nile to Faiyum depression, regulated by dams. Vast agricultural expansion, new cities, fishing. Transported goods, including for pharaohs' pyramid tombs. Canal (now Bahr Youssef) still functions after $4,000$ years.
• Food Storage: Empires developed facilities to store food/resources, planning for famine, war, pestilence.
  • Roman Empire (27 BCE–476 CE): Relied on redistribution of grain, primarily from Egypt/North Africa, to feed Rome and Italian cities.
    • Annona System: Developed by Octavian Caesar. Government contracted private merchants to move $300,000$ tons of grain annually to Rome. Prevented shortages, kept prices low. Later emperors provided free/low-cost grain to over $200,000$ people. Emperor Tiberius recognized grain supply's criticality for state stability. Rome's foreign policy centered on securing food supply (e.g., annexation of North Africa, Egypt).
    • Horrea: Great storage facilities in Rome for grain, wine, olive oil, clothing. Over $300$ horrea by early 3rd century CE. Horrea Galbae (warehouse complex) covered $21,000$ m². Sufficient food stored for $7$ years when Emperor Septimius Severus died in 211 CE.
  • Inca Empire (1438–1533 CE): Redistribution-based economy (no market). Government collected production (root crops, grain, wool, blankets) and stored it for redistribution, especially during food shortages. Food sent from distant facilities or from good harvest years.
    • Qullqa: Storage facilities built throughout the empire, always along the road network. Mantaro Valley (Peru) had over $2,500$ qullqas with $170,000$ m² capacity. Stored vast quantities of weapons (shields, knives, bows) for rapid troop movement, allowing soldiers to obtain equipment from local qullqas.
• Communication Systems: Essential networks for reports, information, decisions, questions flow. Some were more innovative/speedy.
  • Mamluk Sultanate (1250–1517 CE): Developed rapid, efficient postal system due to constant attacks (Crusaders, Mongol, Byzantine, Ottoman Empires). Sultan Baybars (1260–77 CE) enabled government messages between Cairo and Damascus (~$1,000$ km) in $4$ days. Required new roads, bridges, horse/rider stations for non-stop movement.
    • Pigeons: Also used for faster messaging. Stations housed/fed pigeons with small message cases on legs. Pigeons transferred messages between stations (e.g., Gaza). Covered areas without roads (e.g., along the Nile), ensuring vast empire coverage.
  • Mongol Empire (1206–1368 CE): Yam (or Örtöö) system of messengers. Fastest pre-modern communication network due to empire's size. Relay stations 25–65 km apart had rested horses/riders, food, accommodation. Messages traveled 200–300 km/day. Messenger/horse changes at stations. Mongol China alone had $1,400$ postal stations, $50,000$ horses, $6,000$ boats. Primary use for military/government, but merchants also allowed (initially free, later for fee), boosting economy.

What Are the Effects of an Empire's Global Interaction?

• Cultural Exchange: Empires often allow increased movement of people, facilitating the spread of ideas, innovations, technologies, religions, and products, strengthening the state through food production, technological innovation, and economic development.
• Roman Empire (27 BCE–476 CE): Stretched from Scotland to Southern Iraq, Morocco to Romania. Bound by roads, bridges, caravans, ships. Millions moved for employment, military service, tourism, facilitating free flow of ideas and goods.
  • Engineering: Romans built roads, bridges, sewage/water systems, theaters, fortifications in many cities. Spread Roman way of life and allowed local goods/ideas (individuals, plays, texts, medicine) to flow back to Rome. Many structures still exist (e.g., Colosseum, Via Appia, Roman theater in Jordan).
  • Religion: Diverse religious beliefs across the empire. People moved, taking beliefs, sometimes adopting others (e.g., Osiris/Isis temples found everywhere; Roman gods in Egypt; Mithraism spread via military). Christianity spread from Middle East to Europe/North Africa in later years.
  • Language: Latin was official language (Greek in Eastern parts). Hundreds of local languages, but merchants, scholars, officials, soldiers spoke Latin/Greek. Led to Latin-speaking communities, and later formation of Romance languages (Spanish, Portuguese, French, Italian, Romanian) and influence on others (Albanian, Arabic).
• Mongol Empire (1206–1368 CE): Vast empire across Asia, Middle East, Africa, Europe, with hundreds of millions of people under one government. Led to unprecedented sharing of culture, ideas, technology, religion, food.
  • Religion: High tolerance. Rulers built temples, churches, monasteries, mosques for Buddhists, Christians, Taoists, Muslims in Karakorum. Nestorians (Christianity) were influential, even in ruling family. Roman Catholicism missionaries allowed in China. Buddhism spread and Tibetan Buddhism became state religion for Yuan Dynasty (Kublai Khan, 5th Great Khan, encouraged it). Islam initially a threat, but after Abbasid destruction, Mongols became tolerant; many leaders converted. Muslim scholars/officials sent to China, spreading Islam in East Asia.
  • Technology and Ideas: Known for impact on technology/ideas, and their global spread.
    • Gunpowder: Originally Chinese fireworks, adapted as weapon. Mongols adopted from Chinese, spread across Asia, Middle East, Europe. Influenced military architecture, armor, guns, grenades, cannons.
    • Windmill: Developed in Persia, spread across China/Middle East (under Mongol rule), then to Europe.
    • Compass: Developed in China, brought to Europe/Middle East via increased global interactions on the Silk Road. Improved sea navigation.
    • Astronomy/Mathematics: Spread into China from Persia (e.g., idea of latitudes for mapping, terrestrial globe, armillary sphere). Cooperation among multi-ethnic/religious people led to spread of decimals, trigonometry, coordinates, cubic interpolation.
    • Movable Type: Early printing press in Mongol Empire. Increased book production, reduced costs, increased literacy. Spread ideas in philosophy, religion, mathematics, science, literature. Resurrected ancient works (e.g., Plato's The Republic), affecting law, politics, medicine, architecture, philosophy.
  • Agriculture, Travel, Commerce: Significantly strengthened empire. Silk Road expanded and grew in importance.
    • Pre-Mongol Silk Road: Only expensive luxury items (silk, gold, silver) transported. High costs due to taxes from multiple states, security, animal transport. High prices to recover losses.
    • Mongol Silk Road: All states annexed, border taxes abolished, banditry ended, road became safer. Reduced travel time, expenses, security costs. Easier movement of luxury goods, people, agricultural products (tea, spices), books, scientific instruments. Goods moved in greater quantities.
    • Food/Spice Exchange: Cardamom, peppercorns spread to Middle East. Noodles, chickpeas, yogurt spread from Asia to West (Europe). Tea consumption spread across Asia, Middle East, North Africa (luxury item).
    • Paiza/Paizi/Gerege (Passports): Gold/silver tablets (depending on rank) for officials and certain merchants to travel freely, exempt from taxes, receive free use of horses at relay stations and food rations. Ensured officials' recognition and facilitated trade.

How Can Empires Successfully Defend Themselves from Challenges and Threats?

• Protection Methods: Standing armies, alliances, treaties, military constructions.
• Standing Armies: Used throughout history to control provinces, defend against threats, engage in war. Operated as professional warrior classes.
  • Roman Empire (27 BCE–476 CE): Legions of ~$5,000$ soldiers (plus support staff) divided into cohorts (500) and centuries (100). Commanded by generals answering to provincial governors. Standing army system from 108 BCE: all male citizens under 45 eligible, government provided equipment, regular wage. After 25 years, received farmland (often near borders for emergency call-up, cultural Romanization). Peak: $450,000$ soldiers in $33$ legions, providing stability/security.
  • Mongols: Military organized into tumen (armies of ten-thousand, mostly cavalry) with decimal command structure. Generals (selected by Great Khan) could act independently. Genghis Khan's army: 100,000–130,000 full-time professional soldiers. All Mongol males required to serve (minor exceptions). Number increased with expansion. Large standing army ensured safety from attack and internal stability, contributing to Pax Mongolica.
• Alliances: States working together for common interests (mutual defense, military assistance). Most modern states are in alliances.
  • Medes–Babylon Alliance (616–609 BCE): Medes (Iran) and Babylonians (Iraq) rebelled against weakening Neo-Assyrian Empire. Formed alliance. Assyrians allied with Egypt. All-out war for 12 years. Assyrian capitals (Assur, Nineveh) destroyed. Alliance led to independence and destruction of Neo-Assyrian Empire.
  • Delian League (478–404 BCE): Alliance between Athens and ~$300$ Greek city-states. Original purpose: minimize Persian influence, mutual defense, common treasury. Successful against Persians, gaining control of Aegean Sea region. Athens dominated, effectively creating an empire. When Naxos/Thasos tried to leave, Athens attacked and fined them. Successfully freed Aegeans from Persian influence.
• Egyptian–Hittite Treaty (Eternal Treaty): Earliest known bilateral treaty with both sides' versions (approx. 1258 BCE). Between Ramses II (Egypt) and Hattušiliš III (Hittite Empire).
  • Terms: End war, exchange political exiles (e.g., Hattušiliš III's nephew in Egypt), mutual aid against other enemies, leaders' help in suppressing revolts. Intended to be perpetual. Peace held until Hittite Empire's destruction ~80 years later.
• Military Constructions for Defense: Walls, ditches, fortifications (castles).
  • Fortress of Mirgissa (Egypt, Dynasty 12): Constructed on Nile River (Sudan) ~$2000$ BCE. Purpose: control Nile boat traffic, residential base for officials, store grain/goods, protect copper/gold sources, house soldiers. One of many fortresses to control Kush region and deter invasion of Egyptian heartland. Covered $40,000$ m², walls 10m high, 6m thick, with 96 towers. Abandoned, re-established in New Kingdom as administrative centers.
  • Constantinople City Walls: Ancient Byzantium (peninsula between Black/Aegean Seas) chosen as Roman capital by Emperor Constantine (330 CE). Extensive land walls built for protection. By 5th century, new land walls further out, sea walls built. Critical for Byzantine Empire.
    • Theodosius II's Land Walls: Inner wall (12m tall, 6m thick, 96 towers acting as independent castles), outer wall (2m thick, 9m tall, towers between inner wall towers), deep moat (20m wide, 10m deep, floodable), low wall along moat (1.5m). Sea walls (single wall) were 8.5km (Marmara side, 100+ towers) and 5km (Golden Horn, 172 towers).
    • Defense Successes: Protected from many attacks/sieges (Avars, Slavs, Persians in 626 CE; Umayyad Caliphate in 678, 718 CE; civil wars, Crusaders). Only successfully attacked twice: 1204 (Venetians/Crusaders over sea walls during Fourth Crusade) and 1453 (Ottoman Empire with cannons breaking land walls, ending Byzantine Empire).
  • Great Wall of China: Most famous military construction. Originally series of smaller walls (7th century BCE). Qin Shi Huang linked walls. Enlarged/rebuilt over $1,800$ years. Ming Dynasty (1368–1644 CE) length over $8,500$ km with $25,000$ watchtowers, ~$1,000$ fortresses. Extensions brought total to $21,000$ km.
    • Purposes: Control imports/exports (northern China, Silk Road) for taxation, prevent national secrets (silk worms) from leaving. Prevented Chinese peasants from leaving to escape taxes/obligations. Main purpose: prevent nomadic invasions (Mongols) who raided China. Protected China's agriculture.

What Factors Might Be Important for Maintaining a Successful Empire?

• Complex Systems: Empires rely on various interacting factors. Military strength, military architecture, alliances, treaties, and laws are crucial.
• Activity: Comparing the factors that maintain an empire: Imagine being an adviser to the Emperor of China, tasked with prioritizing investment in one factor (military strength, military infrastructure, building alliances, negotiating treaties, developing a new legal system). Identify advantages/disadvantages of each, justify choice in a letter to the Emperor.

To What Extent Is Leadership Important in the Maintenance of Empires?

• Role of Leadership: Leaders play a significant role in guiding and maintaining empires.
• Empires Under Threat Activity: Empires face political, cultural, economic, military, or other crises. How they respond determines their existence.
  • Crises Examples: End of the Bronze Age, Crisis of the Third Century (Roman Empire), Plague of Justinian (Byzantine), Second Islamic Civil War (Umayyad), Jin-Song Wars (Chinese), Toluid Civil War (Mongol), Inca Civil War and Spanish Conquest.
  • Research Question: Develop a research question on how empires approach and react to crises/threats, using at least three examples. Consider consistency of response across the empire and regional differences.
  • Evaluation: Evaluate factors for success/failure during threats, supported by evidence.
  • Arguments: Formulate arguments to address the research question, creating introductory paragraphs for an essay, focusing on chosen examples.

Chapter 4: How do empires fall?

• Statement of Inquiry: Societies survive, fail or transform according to their ability to change in the face of innovation.
• Key Concept: Change and revolution
• Related Concepts: Conflict; Innovation
• Global Context: Scientific and technical innovation
• Inquiry Questions:
  • Factual: What internal factors have led empires to fail? What external factors have led empires to fall? What is left in the aftermath of an empire’s collapse?
  • Conceptual: Why do empires fail? To what extent can environmental factors affect the stability of an empire? To what extent do empires need to maintain dominance in order to continue to exist?
  • Debatable: Have empires and superpowers led to a more peaceful world?
• Chapter Objectives:
  • Find out how and why empires fail.
  • Explore the extent to which the natural world, conquest, and internal change affect empires, and the consequences of an empire’s collapse.
  • Take action by investigating a system in one's own country needing improvement and organizing a letter campaign.
• Key Words: civil war, innovation, natural disasters, revolt, systems.
• Approaches to Learning (ATL) Skills: Collaboration, Information literacy, Critical-thinking, Transfer.
• Learner Profile Attribute: Balanced – considering different perspectives and conflicting views to reach a balanced opinion, and better understand the interdependence between the world and its citizens.
• Assessment Opportunities: Criterion A: Knowing and understanding; Criterion B: Investigating; Criterion C: Communicating; Criterion D: Thinking critically.

Why Do Empires Fail?

• Universal Collapse: All empires in history eventually collapsed due to changing conditions, as they are complex, interdependent systems.
• External Issues:
  • Climate Change: Can cause cooler weather, affecting agriculture (less food, hunger, disease) or forcing population movements (invading other territories/empires).
  • Invasion by Rival State: Outcomes include expansion of the invading state, loss of land, destruction of cities/people/livestock, or complete destruction of the invaded empire (parts taken over).
  • Enabling Factors: Superior numbers, organization, resources, or technology of rival states, or weaknesses of the invaded state. Usually a combination of strengths and weaknesses.
• Internal Issues:
  • System Failure: Failure to maintain systems (taxation, transportation, economic) can lead to weakening and collapse. Corruption is a major factor.
  • Consequences: Civil war, rebellion, independence movements. Collapse or weakening of large states can lead to division into smaller, weaker states, or complete imperial collapse.

To What Extent Can Environmental Factors Affect the Stability of an Empire?

• Natural Disasters: While a single disaster may not destroy an empire, it can weaken it, contributing to eventual collapse.
  • Earthquakes: Massive earthquake in 749 CE severely damaged/destroyed cities in the Umayyad Caliphate heartland (Egypt to Damascus). Reduced population/trade, disrupted tax collection. Occurred during civil war. Caliphate ended one year later (750 CE), replaced by Abbasid Caliphate.
  • Tsunamis: Caused by volcanic eruptions/earthquakes. Santorini volcano eruption (1600s BCE) caused tsunami, destroying settlements/ships on north Crete. Weakened Minoan civilization, which was conquered by Mycenaeans within a few years.
  • Volcanic Eruptions: Release ash/dust, affecting weather, global temperatures, plant growth, agriculture, and people.
    • 536, 540, 547 CE Eruptions: Caused widespread disrupted weather/crop failures.
      • Evidence: Constricted tree rings (North/South America, Europe); sulfate deposits in ice core samples (Greenland, Antarctica).
      • Impact: Chinese records: no summer, snow in August 536 CE. Middle East, Europe, China: dry fog/ash cloud. Ireland: mass starvation from 536 CE. Led to decline/collapse of Teotihuacan, Sasanian, Gupta Empires due to tremendous stress, rapidly declining populations, poor health. Central Asian people migrated (seeking grasslands), bringing new diseases. Eastern Roman (Byzantine) Empire lost ~half its population to starvation/disease.
• Scientific Evidence for Historians:
  • Sources: Glaciers, ice deposits, flowstones (caves), ground, ancient rivers, mud analyzed for chemicals, geological deposits, human occupation traces.
  • Dendrochronology: Study of tree rings to determine age, growth, climate changes (short/long term). Compare ancient trees globally. Understand sunlight effects on agriculture.
  • Radiocarbon Dating: Determines age of organic objects based on carbon decay. Identifies when objects were used, how they changed, and society of origin. Crucial for empires/civilizations without written records (Indus Valley, Minoan, Inca, Aksumite) or with limited records (Xi Xia, Aztecs, Macedonian, Achaemenid, Parthian, Sasanian, Khmer).
• Climate Change: Long-term weather patterns. The 4.2 Kiloyear Event (2200–2000 BCE) caused cooler, drier climate globally.
  • Evidence: Ice core samples (Mount Kilimanjaro, Mount Logan, Andes Mountains); flowstone samples (India, Italy).
  • Impact: More precipitation trapped in glaciers, less meltwater for rivers (Nile, Tigris, Euphrates) that Egypt/Akkad depended on. Less rain, less flooding, no fertile silt. Led to crop failure, starvation, disease spread, population migration. Caused collapse of civilizations/empires.
• Disease: Killed millions, could disable empire systems leading to collapse.
  • Antonine Plague (Roman Empire, 165–180 CE): Smallpox outbreak. ~$5$ million deaths, killed at least one emperor. Provinces depopulated, Roman armies weakened, German invasions. Possibly spread to Han Dynasty China.
  • Smallpox in China (Han Dynasty, 151–185 CE): Seven major outbreaks. Up to $30\%$ of population died. Millions of farmers/ex-soldiers moved to southern China, exploited by landlords/officials. Led to Yellow Turban Rebellion (until 205 CE), causing up to $7$ million deaths and collapse of Han Emperor's authority. Government unable to respond to crises. Han state collapsed after last major outbreak in 185 CE.
  • Aztec Empire (1428–1521 CE): North/South America isolated; native peoples lacked immunity to Old World diseases (measles, influenza, chickenpox, smallpox, malaria, typhoid, common cold).
    • Spanish Invasion (1519–1521 CE): Spanish had technological advantages. BUT disease ultimately destroyed Aztecs. Smallpox killed ~$40\%$ of Aztec population in 1520 CE, including leadership/military. Spanish easily conquered weakened Aztec Empire. Tens of millions of native peoples died over subsequent years. Estimated $90\%$ of all Native Americans in North/South America killed by diseases introduced by Spanish conquerors in 15th-16th centuries.

What Internal Factors Have Led Empires to Fail?

• Civil War: Wars fought between citizens of the same country. Affected many empires, continue today (e.g., Yellow Turban Rebellion, Abbasid Revolt).
  • Causes: Individuals/groups seeking to replace leadership, overthrow governing system, or control part of the state.
  • Consequences: Almost always weaken state (at least short-term): destruction of infrastructure/governing systems, loss of lives, reduced military strength. Can lead to empire's end.
  • Parthian Empire (247 BCE–224 CE): Ruled Iran, Iraq, Armenia, etc. Rival of Rome. Many civil wars (brothers fighting for throne). Rome exploited opportunities to invade. Vologases VI vs. Artabanus IV (208–222 CE) was destructive. Artabanus IV won but empire weakened (destroyed cities, disrupted economy, millions dead/refugees). King of Persis revolted, killed Artabanus IV (224 CE). Parthian Empire ended, Sasanian Empire established.
  • Sasanian Empire (224–651 CE): Continued wars with Eastern Roman (Byzantine) Empire. Massive war (602–628 CE) ended with overthrow/execution of Khosrau II, leading to civil war until 632 CE (multiple rulers, military factions). Empire severely weakened. Turks and Khazars invaded. Arab armies (first Islamic Caliphate) invaded Iraq (633 CE). Majority of empire defeated/annexed within 10 years. Conquest complete by 654 CE.
  • Inca Civil War (1529–1532 CE): Sapa Inca Huayna Capac died of Spanish-introduced smallpox (along with eldest son). Faction in Cuzco named Huascar Sapa Inca; Atahualpa governor of north (Quito). Huascar tried to remove Atahualpa. Short, brutal civil war; Atahualpa won (May 1532), executed Huascar. Spanish (Hernando de Soto) entered, invited by Atahualpa (Nov 1532), captured him. Ransom offered (gold, silver, gems), but Spanish killed Atahualpa (July 1533). Civil war weakened Inca, allowing Spanish complete control by 1572.
• Rebellions: Attempts to overthrow government or replace ruling class. Weaken state through military expense, destruction of army/property, losses of valuable territories.
  • Ming Revolt Against Yuan Dynasty (China):
    • Mandate of Heaven: Central Chinese belief; emperor ruled with divine approval. Loss of approval (floods, corruption, plagues, droughts, famine, war) justified removal.
    • Yuan Weakness (14th Century): High taxation (for large military) led farmers to abandon land. Reduced food supplies, rising costs. Bubonic plague (from 1333 CE) killed up to $90\%$ in Hebei; ~$70\%$ of China's population over 20 years. Floods further devastated country. Indicated Yuan lost Mandate of Heaven.
    • Red Turban Rebellion: Anti-Mongol revolt (1351 CE), led by Zhu Yuanzhang (Buddhist sect). His armies conquered most of China by 1368. Declared himself emperor, founded Ming Dynasty. Took Yuan capital (Beijing) in 1369, drove Mongols north. War continued, but most of China under Ming rule until 1644 CE (Qing Dynasty).
• Independence Movements: Rebellions seeking independence from an empire. Costly for empire (military expense, destruction). Loss of valuable territories weakens empire as a whole.
  • Fatimid Caliphate (909–1171 CE): Shia Muslims from Abbasid Caliphate (Sunni). Believed Islam should be ruled by Prophet Muhammad's descendants. Proclaimed new caliphate in Algeria (909 CE), captured Tunisia from Abbasids. Entered Egypt (969 CE), made Cairo capital. Invaded/annexed Levant, Sicily, Yemen, Syria, Mecca/Medina, gaining prestige.
    • Impact on Abbasids: Loss of provinces/resources negatively affected Abbasids. Fatimids dominated lucrative trade routes. Abbasid caliph lost power to generals/governors. Fatimids also challenged Sunni religious legitimacy. Permanently damaged Abbasids.
    • Fatimid Decline: Weakened by infighting (Turks, Berbers, Africans in army). Lost Levant to Crusaders, Sicily to other Crusaders, North Africa to Berber tribes re-alleging to Abbasids. Eventually only Egypt remained, taken over by Sunni Ayyubid Sultanate (1171 CE) who pledged loyalty to Abbasid Caliphate.
• Breakdown of Imperial Systems: Empires fall when governing systems (bureaucracy, military, legal system) break down, collapse, or become inefficient (e.g., due to corruption).
  • Challenges Due to Size: Once too large, managing systems becomes difficult. Some empires divided into semi-autonomous regions.
    • Roman Empire (27 BCE–476 CE): By 3rd century CE, too large. Constant border wars (Germans, Parthians, Sasanians, desert tribes). Large military, considerable authority for distant generals. Led to 'Crisis of the Third Century' (235–284 CE) with $24$ emperors (generals revolting). Weakened state: borders unprotected, infrastructure destroyed, heavy taxation for conflict.
    • Diocletian's Reorganization (285 CE): Split empire into East/West, each with one Augustus and one Caesar (vice-emperor, future successor). Aimed for peaceful transition. Improved administration (military, economic, political needs addressed faster). Division remained for ~$1.5$ centuries. Western Roman Empire declined by 476 CE; Eastern (Byzantine) continued until 1453 CE.
  • Mongol Empire: Genghis Khan designated Ogedai Khan successor (1227 CE), other sons ruled territories as appanages under Ogedai. Mongke Khan (4th Great Khan) died 1259 CE. Toluid civil war between Kublai and Arike-Boke for Great Khan. Kublai won (1260 CE), but civil war threatened unity.
    • Kublai's Rule: Continued expansion into Song Dynasty China. Adapted Mongol system by adopting Song systems (e.g., named himself founder of Yuan Dynasty, Mandate of Heaven, moved capital to Beijing). Alienated some Mongols. Due to size and Sinicization, distant relatives became more independent.
    • Division: Slowly split into four main divisions, ruled by Genghis Khan's descendants: Yuan Dynasty (China, Kublai's descendants), Golden Horde (Eastern Europe, Russia, Turkey, Black Sea), Chagatai Khanate (Central Asia, Altai Mountains), Ilkhanate (Western Asia, Iran). Treaty in 1304 CE recognized Yuan as head, but functioned as separate states.
  • Corruption: Ancient and modern problem. Selling government positions (e.g., Han Dynasty). Allowed bidders to profit from offices. Weakened ancient states, problem today. Acts as a leakage from circular flow of income, resources wasted. Government/public sector officials use power for personal gain (bribes, inappropriate connections), leading to misallocation of taxpayer money. Democratic governments (accountable to people) seen as stable, but single-party states (China, Cuba) show strong growth/development, challenging this view.

What External Factors Have Led Empires to Fall?

• Innovation: Technological advances radically affect history, providing military advantages (e.g., chariot warfare).
  • End of the Bronze Age (c. 3000–1200 BCE): First writing systems (Mesopotamia, Egypt), bronze metalworking developed. By 1200 BCE, Egyptian and Hittite Empires dominated Eastern Mediterranean (large populations, cities, infrastructure, trade, little conflict). Within 50 years, most Eastern Mediterranean cities destroyed. By 1150 BCE, Hittite Empire gone, region's population collapsed, Egypt confined to Nile Valley (fending off 'Sea Peoples' invasions). Causes debated, evidence from archaeologists/scientists.
  • Changes in Warfare (End of Bronze Age): Chariot warfare changed; limited use. New weapons and mass infantries (foot soldiers) appeared.
    • End of Chariot Warfare: One theory (Dr. Robert Drews): Nomadic/semi-nomadic people (stressed by climate change) used javelins (ancient hunting weapon) in great numbers against chariot teams. Killing a horse disabled a chariot; lightly armored crew easily captured/killed. Chariots/teams were expensive, hard to replace, leaving empires vulnerable.
    • Iron Use: Iron (stronger than bronze) became prominent. Longer sword blades gave warriors greater reach/advantage in hand-to-hand combat.
    • New Tactics: Armies used thousands of foot soldiers (infantry) armed with spears, javelins, bows/arrows. Mass production of arrowheads/spear points (or necessity) may have enabled this. Shift from elite chariot warriors to mass infantry.
  • Conquest of the New World: Europeans (Spanish, Portuguese, English, French) encountered Neolithic-era Native Americans (no metal tools, no large pack animals like horses/camels).
    • Native American Military Technology: Stone points for spears/arrows, obsidian (volcanic glass) blades (e.g., on Aztec bats).
    • European Technology: Thousands of years of advancements: metal armor, armored horses, iron weapons (knives, spears, mace), guns, gunpowder weapons.
    • Gunpowder: Invented in China (700s CE, medicine; 1000 CE, warfare). Spread across Asia via Mongol Empire (13th century). First gun (hand cannon) in China (1287 CE). All types of cannons, hand-held guns spread across Europe, Middle East, Asia.
      • Revolution in Warfare: Allowed less skilled soldiers to be effective (compared to trained archers/cavalry). More destructive, caused more deaths, created effective armies, broke sieges (cannon, explosive mines).
    • European Advantage: Heavily armored, well-equipped Europeans vastly superior. A few hundred Spanish defeated armies of thousands. Rapid defeat of Aztec/Inca Empires (and hundreds of other states) within decades largely due to native lack of this technology.
• Military Superiority: Empires end when defeated by rivals with superior leadership, equipment, numbers, health, or other advantages.
  • Mongols Against Xi Xia and Song Dynasty China:
    • Xi Xia: Mongols defeated Xi Xia despite being outnumbered and Xi Xia having an experienced army and walled cities. Mongols learned siege tactics, starving cities. Xi Xia allied with Mongols against Jin.
    • Song Dynasty China: Difficult to defeat due to vast walled cities (e.g., Xiangyang held for $6$ years) requiring long sieges. Song used innovative weapons (trebuchets, cannon, also used by Mongols). Protected by vast rivers and navy ships (forced Mongols to develop own navy: Kublai Khan built ~$8,000$ ships between 1270–1273). Mongols slowly defeated Song over 52 years (1227–1279).
    • Mongol Success Factors: Professional army, experienced leadership, adaptation of warfare (learning new skills), embracing innovation/change. Long-term aims (e.g., defeating Song over decades).
• Economic Weakness: Trade traditionally brought wealth to empires via taxes on goods (imports/exports) and direct state sales. State monopolies (e.g., Han Dynasty China controlled salt, iron, copper, bronze) generated vast revenues.
  • Vulnerability: Empires losing control of monopolies or trade routes faced severe economic hardship, potentially leading to state collapse.
  • Mamluk Sultanate (1250–1517 CE): Wealthy from controlling Indian Ocean-Red Sea shipping lanes, which connected to camel caravans to Cairo for spice trade (goods from India, Malaysia, Indonesia). Cairo was a rich city.
    • Declining Silk Road: Mongol Empire's fragmentation increased Silk Road trade difficulties, raising prices, prompting alternative routes.
    • Portuguese Sea Route (1497): Portugal found direct sea route to India (around Cape of Good Hope). Portuguese government destroyed competing merchant ships (Mamluk, others) in Indian Ocean/Red Sea. Full war with Mamluks (supported by Venice) from 1505. Portuguese destroyed Mamluk fleet by 1509. Goods from East now sailed around Africa to Portugal, bypassing Cairo.
    • Sultanate Collapse: Mamluk economy collapsed. Unable to purchase weapons or luxury goods. Could not afford an army or rely on allies. Economically weakened, it was invaded by the Ottoman Empire in 1516 (battles at Diyarbakir, Barj Dabiq, Gaza). Cairo captured 1517, last Mamluk sultan executed. Abbasid Caliphate (transferred to Cairo 1258) also ended 1517, its authority transferred to Ottoman sultan. Both ended due to severe economic weakness.

What Is Left in the Aftermath of an Empire’s Collapse?

• Systemic Collapse: Imperial systems often collapse too (communication, legal, security, economy).
• Consequences: Absence of systems, competing armies, disrupted economy. Leads to further conflict as groups fight for control. Long period of instability until a new order/rule is established.
• Activity: The aftermath of an empire’s collapse: Choose an empire studied (or own choice). Evaluate what remained after its collapse. Consider new states (formation, differences, problems, methods to overcome problems, success/failure), replacement government, adoption of old systems, duration of instability. Develop a research question to evaluate one aspect of its aftermath. Example questions: Extent of Byzantine law use in Islamic Caliphate, Bronze Age collapse impact on Egypt, Gupta Empire differences, Umayyad vs. Abbasid governance, military innovation for empire maintenance, Ottoman vs. Mamluk rule in Egypt, Western vs. Eastern Roman Empire independence, disease and Han Dynasty end, Yuan vs. Ming governance, Achaemenid vs. Macedonian Empires, continuation of systems after collapse, Aztec/Inca systems adoption by Spanish.

Have Empires and Superpowers Led to a More Peaceful World?

• Periods of Peace: Empires have created periods of peace (e.g., Egyptian-Hittite peace treaty, Pax Mongolica: increased trade, spread of ideas/technology). Other examples: no major European war from 1815–1853, no major inter-empire conflicts 1870–1914. Post-WWII, superpowers (USA, Soviet Union/Russia) emerged; no major direct confrontation.
• Devastating Conflicts: Empires also involved in devastating conflicts:
  • Mongol Empire: Conflicts (1211–1337) estimated $18.3$ million deaths (sizable percentage of world population).
  • World Wars: First and Second World Wars (20th century) led to up to $100$ million deaths in just over 10 years of conflict.
• Aftermath: Food shortages, vital infrastructure destruction, negative economic/socio-political effects. Empires can cause instability, devastation, destruction.
• Activity: Empires – peace and conflict: Investigate a historian's view (article, book) on whether empires lead to peace or conflict. Evaluate the source's arguments, evidence, and identify counter-arguments (other historians, historical evidence, flaws in reasoning, contradictory events). Plan and write a response arguing the opposing viewpoint.

Chapter 5: What impact do humans have on natural environments?

• Statement of Inquiry: Human choices, through time and in different places, have led to global environmental change that may make our current way of life unsustainable.
• Key Concept: Time, place and space, Change
• Related Concepts: Perspective; Sustainability
• Global Context: Globalization and sustainability
• Inquiry Questions:
  • Factual: Where are different environments located? What are the characteristics of natural environments? How do humans impact on natural environments?
  • Conceptual: Can resources ever be exploited sustainably?
  • Debatable: To what extent is globalization a driver for development, and to what extent a driver for destruction?
• Chapter Objectives:
  • Find out about the characteristics of major natural environments.
  • Explore how human actions can threaten natural environments and the delicate balance between using Earth’s resources and preserving natural environments.
  • Take action by raising awareness of unsustainable human use of Earth and promoting sustainable use.
• Key Words: climate, habitat, sustainability.
• Approaches to Learning (ATL) Skills: Communication, Collaboration, Organization, Reflection, Information literacy, Media literacy, Critical-thinking, Transfer.
• Learner Profile Attribute: Principled – examining how we can sustainably use our Earth’s resources with respect for the dignity and rights of people everywhere and reflecting upon the importance of taking responsibility for our actions and their consequences.
• Assessment Opportunities: Criterion A: Knowing and understanding; Criterion B: Investigating; Criterion C: Communicating; Criterion D: Thinking critically.

Where Are Different Environments Located?

• Biodiversity Threat Map: Visual representation of threats to biodiversity across the globe.
• Environmental Diversity: Earth hosts diverse natural environments (ecosystems/biomes) thanks to its unique ability to sustain life.
  • Focus Areas: Forest, desert, grassland, tundra, aquatic areas.
• Activity: Location of natural environments
  • Climate Graphs: Combination of bar (rainfall on left) and line (temperature on right) graphs. Used to interpret data by looking for patterns and relationships in temperature and rainfall.
  • Map Interpretation: Describing location on a map involves considering hemisphere (northern/southern, eastern/western), distance from equator (latitude) and prime meridian (longitude), continent, neighboring countries, and physical features (mountains, rivers).
• Physical and Human Factors: Population distribution is uneven due to physical factors (relief, soils, climate) and human factors (social, environmental, political).
  • Densely Populated Areas: Common in low, flat lands with fertile soils and moderate climates.
  • Sparsely Populated Areas: Common in extreme climates (high mountains, deserts).

What Are the Characteristics of Natural Environments?

• Rainforests: Cover ~$6\%$ of Earth's surface but host >half of plant/animal species. Warm, humid climate with abundant rainfall due to proximity to the equator.
  • Vegetation Layers: Differing sunlight creates distinct layers.
    • Emergent Layer (50–80m): Most sunlight, tops of tallest trees (straight, branchless trunks).
    • Canopy Layer (30–50m): Most tree crowns, home to insects, birds, mammals. Receives $95\%$ of sunlight.
    • Under Canopy Layer (1–30m): Limited sunlight, woody climbers (lianas) grow up trees. Receives $5\%$ of sunlight.
    • Forest Floor: Dark, gloomy. Little vegetation, susceptible to flooding. Plants adapted to limited light. Receives $2\%$ of sunlight.
  • Vegetation Adaptations: Drip tips (Figure 5.6) for water runoff, thick waxy skins, spiny needle-like leaves, fleshy stems to store water, aerial roots, buttress roots (Figure 5.8).
  • Wildlife: Huge variety due to constant water, diverse food. Large animals (gorillas, jaguars, tigers), small animals (monkeys, birds, snakes, rodents, frogs, lizards). Many live in trees/under canopy for shelter, predator protection, food. Adaptations include specialized diets (e.g., toucan's long bill).
• Deserts: Biomes receiving <$250$mm annual precipitation. Not always hot/sandy; cold deserts exist (e.g., Antarctica, world's largest desert). Extreme conditions challenge vegetation/wildlife.
  • Vegetation in Hot Deserts: Adapted to extreme rainfall/temperature (50°C day, <0°C night).
    • Cactus (Figure 5.10): Example of adaptation. Thick, waxy skins, spiny needle-like leaves reduce moisture loss, fleshy stems store water. Long, porous roots for deep water or shallow, far-reaching roots for wide surface water collection. Seeds lie dormant until heavy rainfall for quick germination/blooming.
  • Desert Wildlife: Many nocturnal (hunt/eat at night), most live underground in burrows (cooler). Mostly herbivores (eat desert plants/seeds). Some get all water from food, others from morning dew. Share characteristics: light color, provide own shade, conserve water.
    • Camel: Well-known for adaptations. (Activity: Identify six ways a camel adapts, e.g., camel feet, camel fur).
• Grasslands (Tropical Savanna Grasslands): Distinct wet/dry seasons. Band along equator between Tropics of Capricorn/Cancer, between tropical rainforests and deserts. Extensive in Africa, Australia, South America, India.
  • Vegetation: Transitional zones, varying with distance from rainforests/deserts. Scrub, grasses, occasional trees near water holes/seasonal rivers. Varies by season.
    • Wet Season: Lush green grasses (3–4m high) thrive, flower, produce seeds. Wooded areas emerge. Baobab trees (Figure 5.14) store water. Acacia trees (Figure 5.15) flourish, provide shelter/shade.
    • Dry Season (approx. 5 months): Very little rain. Vegetation adapts: xerophytic (drought-resistant, small waxy leaves, thorns to reduce transpiration, long roots to water table). Lush grasses turn yellow, wither, die.
  • Wildlife: Plentiful food in wet season supports huge grazing herds. Animals may migrate great distances in dry seasons. Supports herbivores (giraffes, zebras, elephants, wildebeest) and carnivores (lions, leopards, cheetahs, jackals, wild dogs, hyenas). Serengeti plains (Tanzania) known for unique/rich wildlife.
• Tundra: Arctic areas of Europe, Asia, North America. Very little precipitation, temperatures below 0°C most of year, soil frozen almost all year (permafrost). Appears barren, but range of adapted vegetation/wildlife.
  • Vegetation Adaptations: Low to ground (protection from high winds), grow in clusters (protection, shelter), covered by snow in winter (insulation). Photosynthesize in cold, limited sunlight. Small, dark leaves (conserve moisture, absorb heat). Cottongrass (Figure 5.18): short growing season/life cycle, wind-scattered seeds, dense flower head (reduce heat loss), shallow roots (don't penetrate frozen soil). Other vegetation: mosses, lichens, low-growing shrubs/grasses.
  • Wildlife Adaptations: Physical and behavioral adaptations.
    • Migration: Most birds/mammals use tundra as summer home (long days, 24-hour sun).
    • Hibernation: (e.g., brown bear) Consume food in summer, sleep through winter. Fat layer under fur converted to energy.
    • Camouflage/Insulation: Snowshoe hare changes fur color (white in winter, reddish brown in summer). Polar bears: thick white fur, fat layers (insulation), greasy coats (shed water, fur doesn't freeze). Rounded body shape, limbs close to ground (small surface area-to-volume ratio, minimizes heat loss).
• Aquatic Environments: Water-based. Categorized into freshwater and marine.
  • Freshwater Biome: Low salt content. ~$20\%$ of Earth. Unique, diverse species, varying water amounts, different climates.
    • Lakes and Ponds: ~$3\%$ of Earth's surface. Essential for many species. Vary in size. Limited species diversity due to isolation. Divided into zones (littoral, limnetic, profundal), each with distinct biodiversity.
    • Streams and Rivers: Flowing water, source to mouth. Characteristics change along journey. Cooler, clearer at source (snowmelt, higher altitude), home to fish (carp). Widens mid-journey, supports diverse plants/algae (willow trees, river grass) along edges where water is slower. Nearing mouth, murky from sediments (decreased light, less plant diversity, lower oxygen levels), supports fish needing less oxygen. Other wildlife: snails, crabs, snakes, crocodiles, otters, beavers.
    • Wetlands (Bogs, Swamps, Marshes): Combination of water and land. Saturated year-round or seasonally. Often near lakes/rivers. Prevent flooding (overflow area), purify/filter water of nutrients/pollutants before reaching sea. Act as giant sieves. Rival rainforests in biodiversity (amphibians, birds, reptiles). Largest predators: alligators, crocodiles. Other animals: beavers, minks, raccoons, deer. Vegetation adapted to moist, humid conditions (grow underwater, float, roots in water). Examples: water lilies, cypress trees, mangroves.
  • Marine Environments: Oceans (~$2/3$ Earth's surface), estuaries, salt marshes, coral reefs, coastal areas (lagoons). Home to fish, aquatic plants, seabirds, smaller organisms (krill, plankton). Biodiversity varies from surface to ocean floor.
    • Ocean Basins: Atlantic, Pacific, Indian, Arctic. Generally similar below ~$200$m (dark, cold, murky). Characteristics vary greatly in sunlit upper layers.
    • Salinity/Temperature: Varies with freshwater input and evaporation rate. Higher salinity in hotter climes (evaporation leaves salts). Temperature varies with proximity to equator/poles (27°C near equator, –2°C near poles).
    • Biodiversity Hotspots: Highest in coral reefs (tropical oceans near equator/between tropics). Great Barrier Reef (Australia).
    • Coral: Invertebrate animals (polyps). Stomach, tentacle-bearing mouth. Sting/eat smaller organisms (plankton) at night. Form colonies; hard skeletons build reefs upon death. Reefs grow in shallow, sunlit areas (depend on algae for photosynthesis). People confuse coral with plants.

How Do Humans Impact on Natural Environments?

• Dominant Species Impact: Humans (with ~$8.7$ million life forms) have predominantly negative impacts, though innovative/technological advances also have effects.
• Human Impact on the Rainforest:
  • Development vs. Preservation: Developed countries prospered with less environmental awareness. Is it fair to deny less economically developed countries (LEDCs) the same opportunity? Brazil needs to exploit Amazon resources for development. Sustainable management is crucial to avoid devastating impacts.
  • Deforestation: Biggest human threat. Amazon rainforest (especially Brazil) experienced high levels (~$17\%$ loss in $50$ years by WWF estimate).
    • Reasons for Deforestation: Fuel, slash-and-burn agriculture, food production, commercial farming, logging, mining, hydroelectricity.
• Human Impact on Desert Environments: Less severe than rainforests, more gradual, less immediately visible. Opportunities for human development limited (lack of commercial plants, natural resources, inhospitable climate). Still a fragile biome.
  • Desertification: Turning land into desert. Major issue in arid/semi-arid regions, affecting both deserts and grasslands. Complex causes, many linked to human choices and climate change.
    • Causes and Effects (Figure 5.36): Growing population (natural increase, migration) leads to increased food/fuelwood demand. This causes over-cultivation, over-grazing, deforestation. Leads to loss of vegetation, soil erosion, rivers drying up, soils drying out. Exacerbated by less rainfall from climate change/global warming -> desertification.
    • Desertification in the Sahel: Band of ten countries south of Sahara (Mauritania to Eritrea). Highly vulnerable. High rates of natural increase and total fertility rate (Table 5.2) cause rapid population growth. Civil conflict causes migration, increasing food need.
• Human Impacts on Grasslands: Diverse wildlife threatened by poaching and overgrazing. Also subject to desertification.
  • Poaching: Targets 'big ticket' animals (lions, elephants) for furs, tusks, horns. African elephant population dropped from ~$1.3$ million in $1979$ to $600,000$ in $1989$ (ivory trade). >$100,000$ African elephants massacred 2010–2012. Rhino horn black-market price exceeded gold in 2012 (e.g., $£40,000$/kg vs. $£33,000$/kg gold).
  • Safaris/Tourism: Less damaging than poaching, but create problems for the environment (e.g., habitat disruption) if not carefully managed.
• Human Impact in Tundra Areas: Direct human impact limited due to inhospitable conditions. Indirect impacts more noticeable (global warming).
  • Resource Exploitation: Tundra areas rich in natural minerals. Trans-Alaska Pipeline (1,287km) transports oil. Built 1970s, operational 1977. Some sections above ground due to frozen soil. Caused significant environmental disruption (vegetation, wetlands, fish/bird/animal habitats affected/damaged). Concerns about disrupting animal migration routes. Melting snow/permafrost due to heat from oil extraction/transport. Social objections from native groups.
  • Global Warming: Rise in world temperature. Average global temperature increased by 0.85°C (1880–2012). Global average sea level rose $19$cm (1901–2010) due to warming/ice melt. Caused by increased greenhouse gases (water vapor, CO2, methane, nitrous oxide) from industrialization, deforestation, pollution. Global CO2 emissions increased ~$50\%$ since $1990$.
• Human Impact in Freshwater Areas: Driven by growing demand for fresh water for populations. Challenge: meet demand without damaging limited resource supply.
  • Farming and Irrigation: Increasing population demands water for drinking and irrigation. Affects quality of rivers, lakes, groundwater. Intensive agriculture (developed/developing countries) to meet food demand clears forests (soil erosion, more river sediment), drains wetlands (reduced ecology/biodiversity, vital environmental benefits lost). Inefficient systems lead to waterlogged fields, salinization, infertile soil. Sediments/salt decrease usable fresh water, increase purification expense, cause health issues (e.g., low-level arsenic -> cancer). Growing populations divert rivers, drying up wetlands for settlements. Wetlands now $6\%$ of Earth, halved since $1900$.
  • Agro-industrialization Chemicals: Fertilizers/pesticides maximize growth. Leach into groundwater, transfer to rivers/lakes. Increase nutrient concentration, rapid algal growth (algal bloom, eutrophication). Higher algae cover prevents light for fish. Dead algae broken down by decomposers reduces dissolved oxygen, killing freshwater wildlife. Seen in River Kissimmee (Florida), pollutants transferred to marine environment, contributing to acidification of coastal areas, loss of coral reefs/fish-breeding grounds.
  • Dams and Reservoirs: Dams hold back water. Multi-purpose dams generate hydropower. Reservoirs are artificial lakes for water storage. Impact river conditions/surrounding areas.
    • Water Flow Regulation: Dams create deep reservoirs upstream, regulating downstream flow. Prevent large floods but deprive natural wetlands, increase river channel erosion (due to varying flow), decrease channel depth, lower water table.
    • Water Quality: Affected by upstream towns/industry, agriculture (sewage, industrial waste, agricultural run-off). Pollutants not broken down due to slowed river flow. Sediment trapped in reservoir, reducing storage capacity, requiring expensive maintenance.
• Human Impact in Marine Areas: Oceans used for resources for growing populations. Unsustainable use damages marine environments.
  • Overfishing: Driven by food demand. North Sea suffering fish stock depletion. Shared boundary of seven countries led to overfishing (vessels exceeded fish available). Decline in cod; few reach adult size. More fishing needed for smaller catch, worsening problem.
  • Industrial Fishing Methods: Trawlers/nets catch undesired species. Dredgers (for scallops) scratch seabed. Dynamite/blast fishing ruins environment. Injure/kill dolphins (tuna fishing), leading to 'dolphin-friendly' labels (sometimes misleading, Greenpeace warns).
  • Coral Reef Damage: Coral bleaching is prevalent. Caused by ocean temperature increases (>2°C for >2 weeks). Stresses nutrient exchange with algae. Algae leave polyps, coral turns white, can die (algae provide ~$70\%$ of energy). Great Barrier Reef's worst episodes (2016, 2017) caused $67\%$ coral death in some sections, likely permanent damage.
  • Tourism Impact: Economic benefits, but also damage to reef ecosystems (anchor damage, boat collisions, fin damage from divers, trampling, littering, sewage/pollution from hotels/boats/resorts).
  • Plastics in Oceans: Explored in MYP 1. Widespread impact: harm to animals, environmental damage, human health consequences (plastic in food chain).

Can Resources Ever Really Be Exploited Sustainably?

• Sustainable Use: Many countries, companies, charities are exploring/promoting sustainable resource use.
• Sustainability in Rainforests:
  • Palm Oil: Campaigns (Oxfam, RSPO) raise awareness of palm oil use. Green Palm Sustainability logos help consumers make sustainable choices.
  • Sustainable Logging: Brazil has strict deforestation laws. Protected forest areas. Satellite monitoring ensures legal, guideline-following activities. Education for practitioners. Agro-forestry (trees/crops grown simultaneously) provides canopy shelter, prevents soil erosion, crops benefit from dead organic matter. Selective logging (trees felled at certain height, guarantees lifespan for young trees). Afforestation (replacing cut trees).
  • WWF Global Forest and Trade Network (GFTN): Connects companies, communities, NGOs, entrepreneurs in >$30$ countries. Aims to create market for environmentally responsible forest products. Promotes sustainable forest management, reduces demand for illegal products. Raises awareness of bioenergy to reduce forest dependence (aim: $100\%$ renewable energy by $2050$).
  • Sustainable Mining: Carajás Mine has restoration plan (replanting, repairing soil). Supports forest monitoring (extra rangers, cars, boats, helicopters) against illegal logging/poaching.
  • Medical Advances: Rainforest botanical resources provide ~$7,000$ medical compounds prescribed by doctors (cancer, rheumatoid arthritis, AIDS, Parkinson's, kidney stones, anxiety, fever, headaches, Type 2 diabetes). Anesthetic qualities for operations.
• Sustainability in Drylands: Need to prevent desertification recognized. Range of small-scale and global strategies.
  • Local Strategies: Aid agencies/charities educate farmers on productive methods (crop rotation to regenerate soil, minimize erosion, preserve nutrients). Land restoration/afforestation (e.g., 'Great Green Wall' in Sahel/Sahara with drought-resistant shrubs/grasses to bind soil). Improved small-scale irrigation, controlled grazing.
  • Global Strategies: UN Decade for Deserts and Fight Against Desertification (2010–2020) for awareness.
    • 2030 Agenda for Sustainable Development (UN, 2015): Target 15.3: "By $2030$, combat desertification, restore degraded land and soil, including land affected by desertification, drought and floods, and strive to achieve a land degradation-neutral world."
    • World Day to Combat Desertification and Drought: June 17, awareness activities.
• Sustainability in Grassland Areas: Desertification is pressing (e.g., Serengeti). Sustainable management vital for preservation. Locals employ sustainable measures, improved conservation education. Investors encouraged to employ locals, share tourism profits.
• Sustainability in Tundra Areas: Efforts to reduce carbon emissions. 2015 Paris Climate Summit: 195 countries adopted universal, legally binding global climate deal; limit global temperature rise to well below 2°C (strive for 1.5°C). UN Sustainable Development Goals (Goal 13: "Take urgent action to combat climate change and its impacts"). Charities (e.g., Oxfam) support this goal.
• Sustainability in Marine Areas:
  • Great Barrier Reef: Great Barrier Reef Marine Park (1975) and subsequent acts protect/limit damage. 2004: zoned areas (preservation, scientific research, general use, habitat protection) monitor/limit activities. Greenpeace Australia campaigns for #coalfreeaustralia to reduce CO2 pollution (warming oceans, coral bleaching).
  • Pollution from Land Run-off: Soil sediments, nutrients, chemicals washed into oceans at higher rates. Sediments decrease sunlight for coral/algae, smother coral. Nutrients (phosphates, nitrates from fertilizers) increase algal growth, leading to eutrophication.
  • North Sea: Multiple countries with coastline. Laws (since 1960s) regulate sea usage. Efforts to protect fish stocks (limiting fishing times/boats) were hard to enforce. EU Common Fisheries Policy sets quotas, market interventions (expensive: paying fishermen not to fish). Measures (banning catches in nursery areas, nets with larger holes) increased North Sea cod stocks. Marine Stewardship Council (MSC) ecolabel program certified fishery sustainable in 2017. However, stocks fell below safe biological levels by 2019, MSC certificates suspended. Fishing industry taking proactive steps (Fishery Improvement Project) to regain certification (e.g., sustainable Norwegian/Icelandic cod options).

To What Extent Is Globalization a Driver for Development, and to What Extent a Driver for Destruction?

• Globalization's Dual Role: Intertwined with development, it can drive both advancement and destruction, with global trade implying global responsibilities for a fairer future.
• Chapter 9 Connection: Explores how global trade brings global responsibilities.
• Chapter 10 Connection: Defines and examines development.

Chapter 6: How does population change affect individuals and societies?

• Statement of Inquiry: Population change in certain places and times drives social and environmental change, but we must take action to ensure that the benefits are shared by all.
• Key Concept: Change
• Related Concepts: Causality
• Global Context: Orientation in space and time
• Inquiry Questions:
  • Factual: How and why does population growth differ between different regions of the world? What are the causes and consequences of forced migration and internal displacement? What are the consequences of megacity growth for individuals and societies?
  • Conceptual: How has population changed over time and how can it be measured? Can population change be managed?
  • Debatable: Is population growth destructive or can it be viewed as a driver for development?
• Chapter Objectives:
  • Find out how population varies within and between countries and what the impacts are on individuals and societies.
  • Explore contemporary case studies of countries where populations are affected by migration, natural increase, and rapid growth.
  • Take action by looking at issues of internally displaced people and refugees.
• Key Words: migration, natural increase, trends.
• Approaches to Learning (ATL) Skills: Communication, Collaboration, Organization, Media literacy, Critical-thinking.
• Learner Profile Attribute: Balanced – understanding the importance of balancing different aspects of our lives – intellectual, physical and emotional – to achieve well-being for ourselves and others; recognizing our interdependence with other people and with the world in which we live.
• Assessment Opportunities: Criterion A: Knowing and understanding; Criterion B: Investigating; Criterion C: Communicating; Criterion D: Thinking critically.

How and Why Does Population Growth Differ Between Different Regions of the World?

• Uneven Distribution: People are not evenly distributed globally (Figure 6.3) due to physical (relief, soils, climate) and human (social, environmental, political) factors.
  • Densely Populated: Low, flat land, fertile soils, moderate climate.
  • Sparsely Populated: Extreme climates, high mountains, deserts.
• Economic Development Link: Population density has little to do with economic development (Bangladesh and Japan are densely populated but have different income levels).

How Does Population Vary Within Countries?

• Uneven Population Distribution: Often results from varied factors, especially in large countries.
• China Case Study: Most populated country ($1.4$ billion), average density $142.5$ persons/km². Population concentrated in <$1/3$ of country (eastern/southern areas). Much of west/north (Gobi Desert, Himalayas, dry grasslands) is virtually uninhabited.
  • Eastern Coast Cities: Densely populated due to favorable climate, proximity to coast (trade), fertile Yangtze River delta. Growth largely due to migration.
  • Migration History: Major population movements due to famines, political upheaval. Economic reforms from 1970s encouraged rural-to-urban and west-to-east migration (over $140$ million migrants).
  • Voluntary Migrants: Mostly young, poorly educated men seeking improved quality of life, personal freedom, better jobs/healthcare. Make up ~$40\%$ of urban labor force.
  • Impacts on Origin/Destination (Activity): Voluntary internal migration has social, economic, political, environmental impacts on both original rural areas and urban destinations (e.g., hukou status, children left behind, remittances).
• International Migration: Voluntary migration also occurs internationally for similar reasons (enhanced life, economic opportunities).
  • Similarities to Internal Migration: Advantages/disadvantages for origin/destination countries are similar.
  • Additional Challenges: For migrants and destination country residents (e.g., Mexico to USA).
    • Mexico to USA: $2,000$km border. >$1$ million Mexican migrants annually (significant illegal migration). Strong immigration restrictions.
    • Assimilation Issues: Many migrants poorly educated, not fluent in English, making integration difficult. Live in closed communities, reducing assimilation pressure. Leads to tension, segregation, violence, crime.
    • Economic Tensions: Rising unemployment in USA -> Americans competing for low-paid jobs (traditionally taken by migrants). Belief that migrants take 'rightful' jobs increases social tensions.
    • Cultural Upsides: Introduction of Mexican culture (cuisine, music) increases American cultural diversity. Spanish taught in US schools broadens young population's skills.
    • Impact on Mexico: Benefits economically from remittances. BUT, lack of young, working-age population leads to dependent population (elderly). Reduced birth rate further increases dependency ratio.

What Are the Causes and Consequences of Forced Migration and Internal Displacement?

• Forced Migration: Push factors are typically environmental and political (opposed to social/economic for voluntary migration). Huge impact on population change.
  • Terminology:
    • Migrant: Person moving for work or better living conditions.
    • Immigrant: Person coming to live permanently in a foreign country.
    • Emigrant: Person leaving own country to settle permanently in another.
    • Internally Displaced Person (IDP): Forced to flee home but remains within country's borders. (Currently twice as many IDPs as refugees globally).
    • Refugee: Forced to leave country to escape war, persecution, or natural disaster.
    • Asylum Seeker: Political refugee seeking asylum in another country.
• Case Study: Forced Migration from Syria:
  • Push Factors:
    • Civil War (from 2011): Pro-democracy protests (after arrest/torture of teenagers) escalated to demands for President Assad's resignation. Government force worsened situation. Rebel brigades formed (2012).
    • Islamic State (IS): Rose, waged terror campaign (severe punishments, public executions, amputations, mass killings of rivals/minorities).
    • Chemical Weapons Attack (Damascus, 2013): Killed hundreds. Government denied, blamed rebels.
    • Vulnerability of Civilians: Continued attacks on schools, hospitals, water/electricity networks, places of worship, economic assets -> fear for lives.
  • Internally Displaced People (IDPs) within Syria: As of 2016 (UN OCHA report): $6.5$ million IDPs (out of $13.5$ million needing humanitarian assistance, including $6$ million children). $1.2$ million displaced in 2015 alone. UN needed $\$3.2$ billion for 2016. ~$70\%$ lacked adequate drinking water, $1/3$ basic food needs, >$2$ million children out of school, $4/5$ lived in poverty. Aid difficult to reach (agencies refused access). ~$4.5$ million in hard-to-reach areas, ~$400,000$ in besieged locations with no life-saving aid.
  • Refugees: >$5$ million fled Syria since conflict start (mostly women/children). Lebanon, Jordan, Turkey struggled to cope. ~$10\%$ sought safety in Europe, increasing political tensions over burden sharing.

How Has Population Changed Over Time and How Can It Be Measured?

• Changing Populations: Fluid due to migration, births, deaths. Measurement is key for understanding change and making predictions.
• Population Terminology:
  • Birth rate: Live births per $1,000$ people/year.
  • Total Fertility Rate (TFR): Average children a woman would have if surviving all childbearing years (15–49).
  • Death rate: Deaths per $1,000$ people/year.
  • Infant mortality rate: Deaths of children under 1 year per $1,000$ live births.
  • Life expectancy: Expected average lifespan in a population.
  • Natural increase: Population growth rate (birth rate - death rate). Expressed as percentage (natural increase/10).
  • Dependency ratio: Number of dependents (0–14 and >65) to working-age population (15–64).
• Global Population Growth: Slow for most of human history, now rapid ($7.5$ billion at time of writing, $7$ billion reached in $2011$).
• Hans Rosling (1948–2017): Statistician, global health professor. Known as 'the man who makes statistics sing' for making statistics accessible (Gapminder organization). Influential TED Talks. Time Magazine's 100 most influential people (2012).
• Uneven Growth: Not all countries experience growth equally.
  • More Economically Developed Countries (MEDCs): Low population growth (low death rates, high life expectancy, low birth rates).
    • Low death rates due to high healthcare/education standards.
    • Low birth rates due to better contraception access, lower infant mortality, higher women's education (later childbearing).
  • Less Economically Developed Countries (LEDCs): High birth rates, falling death rates -> expanding populations.
    • High death rates due to low life expectancy, high infant mortality from inadequate healthcare.
    • High birth rates due to high infant mortality (offsetting), limited/no contraception access, cultural/ideological reasons against contraception.
    • Improving healthcare lowers death rates while birth rates remain high.
• Fertility Rates: TFR is a more accurate measure than birth rate for comparing fertility internationally.
  • Age-Specific Fertility Rates (ASFR): Live births to women in a specified age group (e.g., 15–19, 20–24) per $1,000$ women in same group. Compares childbearing ages over time/place.
    • Example (2016 UN data): Tanzania: women bear children young (peak 20–24), high ASFRs. UK: later childbearing (peak 30–34), lower ASFRs.
  • Total Fertility Rate (TFR): Average number of children born alive to a woman over her lifetime, based on current ASFRs. Hypothetical but useful for international comparison.
    • Replacement Level Fertility: TFR of $2.1$ (two births to replace parents, $0.1$ for premature death). If sustained, each generation replaces itself without migration/natalist policies.
    • Example: Tanzania TFR $5.44$ (way above replacement); UK TFR $1.95$ (below replacement). Both populations growing (UK due to migration).
• Thomas Robert Malthus (1766–1834): Economist. An Essay on the Principle of Population (1798) theory: population grows exponentially, food linearly -> famine. Advocated 'checks' to avoid catastrophe.
  • Negative Check: Decreased birth rate (e.g., contraception).
  • Positive Check: Increased death rate (e.g., disease, war). Referred to as Malthusian crises (e.g., global epidemics).
  • Belief: Checks more likely as population nears/exceeds limits (government action, increased competition/hardship).
  • Malthusianism: School of thought (e.g., Paul Ehrlich, Population Bomb).
• Ester Boserup (1910–1999): Danish economist. The Conditions of Agricultural Growth (1965) challenged Malthus: food production can/will increase to match population needs. 'Necessity is the mother of invention' – crisis inspires innovation (e.g., disease/drought-resistant crops).
• Demographic Transition Model (Figure 6.14): Illustrates population change over time and differences between developed/developing countries based on birth/death rates.
  • Five Stages: Countries progress through stages to greater economic development.
    • Stage 1 (High Stationary): High birth/death rates, low stable population.
    • Stage 2 (Early Expanding): High birth rates, falling death rates, rapid population growth (most LEDCs).
    • Stage 3 (Late Expanding): Falling birth rates, continued falling death rates, slower population growth (some LEDCs).
    • Stage 4 (Low Stationary): Low birth/death rates, high stable population (MEDCs).
    • Stage 5 (Declining?): Low birth rates, death rates may rise (ageing population). Total population high but declining (e.g., Germany).
• Population Pyramids (Figure 6.15): Visual representation of population structure (males/females in age groups).
  • Shape Interpretation:
    • Triangular (e.g., Tanzania 2017): High young dependents, low life expectancy (LEDCs).
    • Barrel-like (e.g., UK): Falling birth rate, rising life expectancy (developing MEDCs).
    • Upside-down Pyramid: Ageing population, very low birth rate.
  • Information Conveyed: Birth/death rates, life expectancy, dependents (young/old), proportion of economically active.

Can Population Change Be Managed?

• Projections and Planning: Demographers use models (demographic transition, population pyramids) to make projections, aiding government planning for future population issues (e.g., high/low birth rate).
• Population Policies: Governments implement pro-natalist (increase births) or anti-natalist (decrease births) policies.
  • China's One-Child Policy: Famous and arguably successful anti-natalist policy, though it led to current problems (e.g., gender imbalance, aging population, future workforce shortages).
• Activity: Population presentations: Groups research pro-natalist (France, Japan) or anti-natalist (China, Singapore) policies. Outline situation, government encouragement, evaluate success (positives/negatives), document sources.

What Are the Consequences of Megacity Growth for Individuals and Societies?

• Megacity Definition: City with >$10$ million people. Growing globally (37 megacities in $2017$, predicted $41$ by $2030$). Eight of top ten (Table 6.4) are in Asia.
• Contributing Factors: High birth rates in developing countries (Asia), rising healthcare standards (falling death rates), but primarily rural-to-urban migration.
• Impacts on Individuals and Societies:
  • Perceived Social Benefits (for individuals): Enhanced employment, earning potential, wide range of recreation, modern technology (safety, comfort).
  • Alienation in Developed Megacities (e.g., Tokyo): Rising mental illness and suicide rates (e.g., >$25,000$ suicides in $2015$, mostly men). Cultural taboo around mental illness, lack of understanding of depression. Cultural practices like hikikomori (acute social withdrawal). Booming technology industry increases isolation. Rise of 'rent a friend' businesses.
  • Issues in Less Developed Megacities (e.g., Mumbai): Inadequate housing, sanitation systems (densely populated slums). Poor economy, weak infrastructure -> inability to support urban population. Over half of Mumbai residents in slums: huge public health, environmental, land use problems. Lack of water/sanitation, malnutrition, inadequate housing -> deadly conditions. Spread of infectious diseases due to close proximity. High unemployment, inadequate schools -> poor quality of life. Slum residents face eviction (e.g., Lagos, Nigeria) as land is valuable for new developments.

Is Population Growth Destructive or Can It Be Viewed as a Driver for Development?

• Debate: The issue of population growth's nature (destructive vs. driver for development) is complex.
• Activity: Population essay: Write a 1,000–1,500-word essay addressing the question, stating an opinion, balancing arguments (considering Malthus and Boserup), using evidence (examples, figures, statistics), and compiling a bibliography.

Chapter 7: Can urban systems and environments be managed sustainably?

• Statement of Inquiry: Sustainable living in future urban communities will require new ideas, scientific and technical innovation and systems, and a revolution in our way of life.
• Key Concept: Sustainability, innovation
• Related Concepts: Scientific and technical innovation, Systems
• Global Context: Sustainable living in future urban communities
• Inquiry Questions:
  • Factual: What is sustainable development? What are the main problems urban areas face? Where can sustainable cities be found?
  • Conceptual: How can the city be viewed as a system? What is the relationship between innovation and sustainability?
  • Debatable: Can a truly sustainable city exist?
• Chapter Objectives:
  • Find out how cities can be viewed as systems and how some cities are taking steps to become more sustainable.
  • Explore the concept of sustainability and how scientific and technological innovation are impacting on this.
  • Take action by trying to raise awareness of the Sustainable Development Goals.
• Key Words: carboon footprint, development, oxymoron, subjective, sustainable.
• Approaches to Learning (ATL) Skills: Communication, Collaboration, Organization, Critical-thinking, Creative-thinking.
• Learner Profile Attribute: Risk-takers – approaching uncertainty with forethought and determination; working independently and cooperatively to explore new ideas and innovative strategies; being resourceful and resilient in the face of challenges and change.
• Assessment Opportunities: Criterion A: Knowing and understanding; Criterion B: Investigating; Criterion C: Communicating; Criterion D: Thinking critically.

What Is Sustainable Development?

• Egan Wheel (Sir John Egan, 2004): Examined how communities could be more sustainable, defining such communities as meeting "the diverse needs of existing and future residents, their children and other users" by offering choice. Has eight components for evaluating cities/urban areas:
  • Thriving Economy: Local money, businesses, and spending improve quality of life, create jobs.
  • Environmentally Sensitive: Minimize climate change (recycle, save water, build on waste land), create cleaner neighborhoods.
  • Fair for Everyone (Equity): Equal access to services, jobs, education for all ages, races, cultures, sexes, abilities; benefits future generations.
  • Well Run (Governance): Local people included in decision-making; civic values, responsibility, pride.
  • Active, Inclusive, Safe (Social & Cultural): Community spirit, welcome in events, neighbors look out for each other, fair treatment, low crime, effective policing.
  • Well Designed and Built (Housing & Built Environment): Positive 'feeling', attractive and useful buildings, open space for play/relaxation.
  • Well Served (Services): High-quality services for families/children; range of affordable public, community, voluntary services accessible to all.
  • Well Connected (Transport and Connectivity): Public transport reduces car dependence; facilities for safe walking/cycling.
• Sustainable Development Goals (SDGs, UN, 2015): Replaced Millennium Development Goals. Goal 11: "Make cities and human settlements inclusive, safe, resilient and sustainable."
  • Targets (UN Development Programme): Half of humanity (3.5 billion) in cities today, ~$60\%$ by $2030$. $95\%$ of urban expansion in developing world. $828$ million in slums, rising. Cities occupy $3\%$ of land, but command $60-80\%$ of energy consumption, $75\%$ of carbon emissions. Rapid urbanization strains water, sewage, living environment, public health. High density can bring efficiency gains, technological innovation, reduced resource/energy consumption.
  • Debate: Is the idea of a sustainable city an oxymoron, given the pressures of urbanization?

How Can the City Be Viewed as a System?

• City as a System: Richard Rogers' Cities for a Small Planet (1997) identified two city types:
  • Unsustainable Linear City: Inputs (food, goods, non-renewable energy, people) lead to outputs (waste to landfill/rivers/sea, air/noise pollution, wealth, sprawl) without reprocessing.
  • Sustainable Circular City: Reprocesses outputs (recycling organic/inorganic waste, conservation/renewable energy, reduced outputs), leading to less environmental impact.
• Carbon Footprint: Measures environmental impact (all greenhouse gases, expressed in CO2 equivalent, CO2e). World average: ~$6$ metric tonnes CO2e/person/year. CH4 (methane) is 20-30x more warming than CO2. Data analysis of carbon footprints is important for understanding large geographical regions over time.
  • Activity: Calculate personal carbon footprint (WWF calculator). Analyze carbon footprint by country data (Table 7.1), identify trends/anomalies, discuss commonalities among high-footprint countries, evaluate reliability of carbon footprint as a sustainability measure.

What Are the Main Problems Urban Areas Face?

• Urban Stress: A multitude of problems, varying between high- and low-income countries, but air pollution and urban congestion affect most. Includes overcrowding, noise, green space depletion, waste, poor housing, social deprivation, crime, inequality.
• Urban Congestion: Demand for travel exceeds supply, preventing free movement. Goverments revisit policies. Attributed to rapid city growth in LEDCs (without planning), more affluent populations (increased vehicle ownership). In MEDCs, commuting by car due to distance from work.
  • Impacts: Inconvenience, urban stress. Contributes to air pollution (traffic idling, vehicle exhaust emissions of CO2, nitrogen oxides, particulate matter). Damages urban environment, causes respiratory diseases.
  • WHO Report: "Ambient air pollution: A global assessment of exposure and burden of disease" (2012) states air pollution is biggest environmental health risk. One in nine deaths related to air pollution, ~$3$ million solely from outdoor air pollution.
  • SDG Reflection: Air pollution levels in cities (SDG 11 indicator), access to clean energy (SDG 7 indicator), mortality due to air pollution (SDG 3 indicator).
• Depletion of Green Spaces: Made worse by urban growth and need for infrastructure.
• Social and Economic Inequality: Extreme differences in poverty/wealth, well-being, access to jobs/housing/education. Occurs in developed/developing countries.
  • MEDCs (Inner-city areas): Highest inequality/deprivation due to older housing, declining industry. Problems: overcrowded households, higher death/infant mortality rates, social segregation, persistent unemployment. These combine with economic/environmental problems in a cycle of deprivation (Figure 7.8: poor skills -> poor living conditions -> poverty -> poor education -> ill health).
  • LEDCs (Overcrowding/Slums): Overcrowding, slums, shanty towns, squatter settlements (from rural-urban migration, see Chapter 6). Poor living conditions (no sanitation/water/amenities/employment/security). Cause land disputes. Public health crisis: lack of water/sanitation, malnutrition, inadequate housing -> deadly conditions. Infectious diseases spread easily due to close proximity. High unemployment, inadequate schools -> poor quality of life. Slum residents face eviction due to valuable land.

Where Can Sustainable Cities Be Found?

• Sustainable Management Approaches: Purpose-building sustainable cities/towns or retrofitting existing cities (adapting systems/practices).
• Masdar City, Abu Dhabi (Purpose-Built 'Eco-City'): Began in 2008 to be world's most sustainable low-carbon city.
  • Aims: Low carbon footprint (during/after construction), entirely renewable energy, research/education in sustainable technology, city/building design for comfort (reduce A/C, heating, artificial light), educate 75% of 40,000 residents in sustainability (5 hours/year), pedestrianized city with underground transport.
  • Design Features: Captures prevailing winds, naturally cool outdoor public spaces (traditional panelling/architecture). Walls reduce A/C demand by 55%. Narrower, shaded, pedestrianized streets. Site slightly raised for cooler air. 45m-high wind tower cools public square. Powered by 10 MW solar plant and 1 MW rooftop system (17,500 MWh clean electricity, divert 7,350 tonnes CO2 emissions annually). Almost car-free, uses automated electric vehicles.
  • Success Evaluation: Contentious. Global crisis (2008) slowed growth. Population ~$1,000$ in 2017 (mostly students/faculty/Siemens employees) instead of planned 50,000 residents/40,000 commuters by 2015. Completion pushed to 2030. Problems: construction industry's low sustainability (carbon/water), high cost ($22$ billion), reliance on external power stations. Criticism: doesn't increase UAE's overall sustainability (surrounded by unsustainable developments like Dubai's artificial ski slope, islands).
• Curitiba, Brazil (Adapting a City): Capital of Paraná state. Transformed from agricultural to manufacturing city through sustainable planning. Global Sustainable City Award (2010). Aims: improve environment, reduce pollution/waste, improve quality of life.
  • Timeline: Urban master plan since 1968. Jaime Lerner (mayor from 1971) instrumental in sustainability development.
  • Methods (Budget: $\$600$ million annually):
    • Reduced Car Use: Five main arterial traffic roads with central, dedicated Bus Rapid Transit (BRT) lanes (two-directional public transport). Cheaper than tube, more sustainable. $80\%$ of travelers use BRT (triple-section 'bendy buses'). Same cheap fare for all journeys helps poorer residents. >$200$ km of bike paths. Car use $25\%$ lower than national average. Low air pollution.
    • Open Spaces and Converted Natural Environments: Green space increased from $0.5$m² to $52$m² per person. >$1,000$ parks/natural areas (many in flood-prone areas, still useful). Residents planted $1.5$ million trees. Builders get tax breaks for green space.
    • Good Recycling Schemes: $70\%$ of rubbish recycled. Paper recycling saves $1,200$ trees/day. Residents receive food/bus tickets for recycling in difficult collection areas.
• Other Examples of City Adaptations: London's congestion charge, Hong Kong's vertical greening, Copenhagen city bikes. UK government offers incentives for cycling to work.

What Is the Relationship Between Innovation and Sustainability?

• Intertwined Roles: Innovation and technology are crucial for improving sustainability, especially in urban areas.
• Smart Technology for Reduced Congestion:
  • Bill Ford's Vision: "A future beyond traffic gridlock" (2011).
  • Waze (2009, ideas from 2007): App developed solutions for better choices (fastest route, right time to leave), ride-sharing. Global community of >$115$ million users. User-powered reports via hands-free voice control (traffic alerts, obstacles). Redirects users. Bought by Google (2013) for $\$1.3$ billion, adding social data to mapping. ~$50$ million users.
  • Uber (2009): App connecting drivers with passengers, bypassing centralized booking. Operates in >$644$ cities, $77$ countries. Valued at $\$82.4$ billion (2019).
    • Sustainability Claims: Reduces need for car ownership -> fewer cars, less congestion, lower carbon emissions (especially with hybrid vehicles). Developed 'Uberpool' (ride-sharing). Experimenting with electric cars (Portland, Oregon) and self-driving vehicles.
    • Controversies: Pricing, driver conditions, passenger safety. London revoked license (2017) due to 'not fit and proper' concerns. Appealing, operating on temporary license.
• Meet a Significant Individual: Veena Sahajwalla:
  • Background: Director, Centre for Sustainable Materials Research and Technology (University of New South Wales). "Waste warrior." Passionate about recycling and waste materials, especially e-waste.
  • 'Green Steel': Invented environmentally friendly technology for recycling end-of-life rubber tires to replace coal/coke in steelmaking. Diverted >$2$ million tires from landfill, reduced greenhouse gas emissions.
  • Advocacy: Promotes females in science/technology, set up program to inspire Australian girls/young women into STEM degrees/careers.
• Activity: Design your own piece of smart technology: Individually or partnered, create smart technology (app, machinery, new tech, or improvement to existing tech) to increase urban sustainability. Brainstorm, research, outline invention's function, identify problems/limitations. Evaluate process/results. Pitch idea to investors.

Can a Truly Sustainable City Exist?

• Debate: The feasibility of a truly sustainable city.
• Activity: Sustainability essay: Write a 1,000–1,500-word essay on "To what extent cities can be sustainable," referencing named examples. Discuss, offering a balanced review of arguments, factors, hypotheses, supported by evidence. Consider social, environmental, economic aspects. Compile a bibliography.

Chapter 8: How do we decide what to produce?

• Statement of Inquiry: Different individual choices by consumers and producers in a market system lead to the allocation of resources.
• Key Concept: Systems
• Related Concepts: Resources; Choice; Perspective
• Global Context: Personal and cultural expression
• Inquiry Questions:
  • Factual: What economic systems exist to allocate resources? What is an economy?
  • Conceptual: How do markets work? Why and how do governments intervene in markets? What is a recession and why is it bad?
  • Debatable: To what extent do markets improve our lives? What is the role of the government in shaping the economy?
• Chapter Objectives:
  • Find out how the market system works under capitalism to allocate limited resources.
  • Explore different markets for goods and services and how they might (or might not) allocate resources effectively.
  • Take action by using film in a creative way to campaign for the reduction of plastic pollution.
• Key Words: economics, government, markets, prices, resources, society.
• Approaches to Learning (ATL) Skills: Communication, Information literacy, Critical-thinking, Media literacy.
• Learner Profile Attribute: Risk-takers – discovering that people take risks to start their own businesses and engage in the economy in a productive way.
• Assessment Opportunities: Criterion A: Knowing and understanding; Criterion B: Investigating; Criterion C: Communicating; Criterion D: Thinking critically.

What Economic Systems Exist to Allocate Resources?

• Scarcity and Allocation: The fundamental economic problem is scarcity (limited resources). Societies must decide what, how, and for whom to produce. Systems differ based on government's role.
• Factors of Production (Resources): Four main categories:
  • Land: All natural resources.
  • Labour: Human work.
  • Capital: Human-produced resources.
  • Entrepreneurship: Skills for starting businesses (creativity, risk-taking).
• Production Possibilities Curve (Figure 8.2): Illustrates trade-offs. If a country (e.g., producing books and computers) uses all resources, it can produce various combinations (e.g., $300$ books/$0$ computers, $50$ computers/$0$ books, or $150$ books/$25$ computers at point X).
  • Points: X, Y (on curve) represent efficient use. Z (inside curve) represents inefficient use.
• Economic Systems: Two main types:
  • Command Economies: Decisions about what/how to produce made centrally by individuals/groups with full control.
    • Ancient Examples: Slavery (Rome, Egypt – building roads, pyramids, domestic tasks). Feudalism (Medieval Europe – monarch/lords owned land, peasants worked for them; agriculture dominated).
    • Modern Example: Communism (Karl Marx, Friedrich Engels – The Communist Manifesto, 1848). Response to poor worker treatment in industrial cities, increasing inequality. Argued capitalism would lead to its end (competition -> lower prices -> wage cuts -> socialist revolution -> workers control production). Marx/Engels predicted state 'withering away'; 20th-century socialist revolutions maintained central planning.
  • Market Economies: Dominant global system. Decisions driven by interactions of buyers/sellers (price mechanism).
    • Historical Context: Grew from Renaissance onward in Europe. Middle class (merchants, traders, skilled manufacturers) emerged, moved to urban centers. Early modern period: civil wars (Great Britain), American Revolution (1776), French Revolution (removed monarchy). Thinkers like Adam Smith, Voltaire advocated for freedom from autocratic monarchies, individual economic determination.

How Do Markets Work?

• Markets: Any place where buyers and sellers meet. Basis of economic activity.
  • Participants: Buyers want goods/services for wants/needs. Sellers produce goods for revenue/profit. Entrepreneurs are risk-takers starting businesses.
  • Value and Price: Decisions to buy/sell based on perceived value, captured by price. Production decisions governed by the price mechanism.
• Demand: Negative/inverse relationship between price and quantity consumers want to buy (Law of Demand).
  • Downward Sloping Demand Curve (Figure 8.5): Buy more if cheaper. Lower prices make consumers relatively richer; similar goods become relatively more expensive.
  • Caveat: Assumes prices fixed; actual prices determined by market forces.
• Supply: Upward sloping curve (Figure 8.6).
  • Explanation: Strong incentive to produce more as potential revenue increases. Prices must rise to cover increased production costs.
• The Supply and Demand Diagram (Figure 8.7): Combines supply and demand curves. Intersection is equilibrium (balance), setting market price and quantity sold.
  • Equilibrium Price: Only at this price are quantities demanded and supplied equal.
  • Surplus (Excess Supply/Glut): At higher prices (P2), suppliers increase production (Q2), but consumers demand less (Q3). Downward pressure on price to correct disequilibrium. Sellers reduce price to sell more.
  • Shortage (Excess Demand): At lower prices (P3), demand rises (Q4), but producers supply less (Q5). Upward pressure on price (like an auction).
  • Clearing Price: Market-set price where no shortages/surpluses, disequilibrium corrected. Changes indicate disequilibrium. Rising prices: demand > supply. Falling prices: supply > demand.
  • Adam Smith's 'Invisible Hand': Concept from Theory of Moral Sentiments (1759) and The Wealth of Nations (1776). Market forces self-regulate and determine prices.
• Meet a Significant Individual: Adam Smith (1723–1790): Scottish economist, 'father of economics.' Studied moral philosophy. First to express economic ideas to understand national wealth, moving beyond morality/religious significance. Understood markets/price mechanism as self-regulating. Advocated government intervention based on discovered principles.
• Changing Markets: Participant behavior constantly changes, altering market outcomes.
  • Determinants of Demand (Shift Demand Curve, Figure 8.10): Changes in income, taste, prices of substitute/complementary goods, number of buyers, consumer expectations. (Changing price causes movement along curve, not a shift).
    • Example: New advertising campaign for clothing can shift tastes, increasing demand.
  • Self-Correction Example (Mulberry Handbag): Increased demand for popular 'Bayswater' handbag shifted demand (D1 to D2). At old price (P1), excess demand (Q2 demanded, Q1 supplied). Price increased to stimulate production and ration goods. Mulberry's strategy to become luxury brand caused sales/profits to fall; forced rethink of pricing.
  • Determinants of Supply (Shift Supply Curve, Figure 8.11): Natural conditions (weather), costs of inputs, technology, taxes/subsidies. (All relate to production costs for firms).
    • Assumption: Firms are profit-maximizers (to simplify economic models).
• Model Simplification: In economics, models are constructed to simplify the complex real world. Involves holding some variables constant and making assumptions about behavior. Difficult compared to controlled science experiments.
  • Example (Crude Oil Market): Oil prices rose dramatically (to $\$148$/barrel in 2008), causing problems. USA exploited domestic resources (e.g., hydraulic fracturing/fracking). This technology increased supply of crude oil (S1 to S2 in Figure 8.14). Resulted in glut at original price, eventually price fell to P2, market cleared at Q3.

To What Extent Do Markets Improve Our Lives?

• Market Efficiency: An efficient market has social costs equal to social benefits, and supply equals demand (Figure 8.17). At equilibrium, marginal private benefit (consumer value) equals marginal private cost (cost of producing unit). If no externalities, private costs/benefits equal social costs/benefits. Consumer and producer surplus are maximized, leading to allocative efficiency.
• Market Failure (Externalities): Occurs when people outside a transaction are affected (positive or negative impact), because society values the outcomes differently than private individuals/producers.
• Negative Externalities: Society values product/service less than producers/consumers.
  • 1. Negative Externalities of Consumption: Private benefit does not equal social benefits. Price of good doesn't cover external costs.
    • Example: Bottled Water (Figure 8.18): $20,000$ bottles produced/second. Developed world uses bottled water as luxury, despite safe tap water. Plastic waste causes problems: chemicals (BPA) leak (hormone disruptors), pollutes natural environment (beaches), broken-down plastic ingested by animals. Social benefits < private benefits; price doesn't cover external costs (e.g., plastic pollution). Overconsumption -> inefficient resource allocation, lost community surplus (welfare loss, represented by red triangle).
    • Activity: Plastic Pollution Campaign: Create a video to raise awareness about single-use plastics in school. Relevant to Great Pacific Garbage Patch.
  • 2. Negative Externalities of Production: External costs arising from production. Marginal social costs (MSC) > marginal private costs (MPC). Producers pay less than society pays to deal with consequences.
    • Example: Fish Market (Figure 8.19): >$1$ billion people rely on oceans for income. Fish integral to global cuisine/culture. Increased demand for diverse/specific fish. Some industrial fishing methods have negative consequences:
      • Trawlers/Nets: Catch non-target species.
      • Dredgers: Scratch seabed (e.g., for scallops).
      • Dynamite/Blast Fishing: Uses explosives, ruins surrounding environment.
• Positive Externalities: Positive impact on people outside the transaction.
  • 1. Positive Externalities of Consumption: Social benefits of consumption > private benefits.
    • Example: Education (Figure 8.21): Individuals gain qualifications/income, but society benefits (greater tax revenue, more productive workforce, lower crime rates). Free market under-provides (price rations education). Society prefers more school places (Q2) than free market provides (Q1).
    • Example: Museums/Cultural Venues: Free market under-provides if price charged. Individuals gain knowledge/appreciation. Social benefits: happier, more aware society; understanding social/national/cultural groups.
  • 2. Positive Externalities of Production: Social costs < private costs. Private firms pay for benefits enjoyed by others.
    • Example: Beekeeping (Figure 8.22): Farmer keeps bees for honey. Bees pollinate nearby plants (e.g., fruit trees). Apple growers benefit greatly without paying beekeepers. Beekeeper's costs are MPC, but apple grower enjoys lower costs (MSC).

Why and How Do Governments Intervene in Markets?

• Necessity: Market failures (under/over-provision of goods) usually require government intervention to influence the price mechanism and adjust market behavior.
• Taxes:
  • Income Tax: Most common, funds healthcare, welfare. Different rates based on income.
  • Indirect Tax (Figure 8.23): Taxes suppliers of goods/services, passed to consumers as price increase. A non-price determinant of supply, shifts supply curve inwards (Supply to Stax). Quantity demanded falls to Q* (allocative efficiency). Prices rise to P, but producers receive P2 (difference P-P2 paid to government).
• Subsidies: Used to increase production of products with positive societal effects.
  • Mechanism (Figure 8.24): Per-unit payments lower production costs for producers, increasing market quantity (Q1 to Q2). Producer price increases (P1 to P2), consumer price falls to socially optimum level P*.
  • Funding: Governments use tax revenues to fund subsidies. Requires careful decisions about taxpayer money, as priorities vary.
• Price Ceilings (Maximum Prices): Set below equilibrium price to keep goods affordable (e.g., concert/football tickets).
  • Impact (Figure 8.25): Price set below equilibrium (P3). Quantity demanded rises (Q1 to Q2). Quantity supplied falls (Q1 to Q3) because lower prices may not cover costs. Creates excess demand (shortage). Requires mechanisms to allocate tickets.
• Price Floors (Minimum Prices): Minimum price set by government for product/service, above equilibrium price.
  • Example: Minimum Wage (Figure 8.26): Price floor at P2. Quantity of workers willing/able to work increases (Q1 to Q2). Theoretical consequence: firms decrease labor demanded (Q1 to Q3) due to higher production costs, creating unemployment (between Q2 and Q3).
  • Debate: Fierce debate on whether minimum wages raise unemployment. Data varies by country. Some argue above-inflation minimum wage increases accelerate automation.
• Laws and Regulation:
  • Laws: Legal limits on activity/behavior (e.g., age for alcohol sales). Effectiveness needs consideration.
  • Regulation: Monitoring industries/markets (usually by government office) responsible for health/well-being (e.g., healthcare, finance, education, food). Costly; new measures unpopular.
• Conclusion: Free market may be best resource allocation system, but capitalism still has problems governments must solve.

What Is an Economy?

• Definition: Refers to all productive activity in a geographical location (e.g., Shanghai economy, Colombian economy, global economy). Encompasses all markets.
• Circular Flow of Income (Closed Economy, Figure 8.28): Simple diagram depicting all transactions.
  • Main Exchanges: Households acquire goods/services, producers receive revenue. Producers buy factors of production, households earn income from selling resources.
  • Interdependence: Consumers stop consuming -> producers stop earning -> inability to pay workers -> vicious cycle.
• Open Economy (Includes Government, Banks, Foreign Markets, Figure 8.29): Income can flow out (leakages: savings, taxation, import expenditure) and in (injections: investment, government expenditure, export expenditure), allowing economy to shrink or grow.
• Governments: Important role, can steer economy.
  • Tools: Raise revenue (direct/indirect taxes on consumers/producers); spend revenue (schools, armed forces, roads). Influence disposable income.
• Banks (Financial Intermediaries): Channel surplus funds from savers to investors (entrepreneurial efforts).
  • Interest Rate: Charged to lenders. Income leaves circular flow as savings, returns as investment in firms. Crucial for small business loans.
• Foreign Markets: Countries trade goods/services.
  • Exports: Firms sell goods abroad, gain access to new customers, earn export revenue (injection into economy).
  • Imports: Spending on goods from abroad (import expenditure, leakage from circular flow).
• Aggregate Demand (AD) and Aggregate Supply (AS): Extend circular flow to all demand/supply in economy ('aggregate' = altogether).
  • Diagram (Figure 8.31): X-axis: Gross Domestic Product (GDP). Y-axis: Price level of entire economy.
  • Price Level Changes:
    • Inflation: Price level increases.
    • Deflation: Price level decreases.
    • Disinflation: Price level increases, but at a slower rate.
  • Aggregate Demand (AD = C + I + G + (X–M)): Demand from all groups (households, firms, government, foreign markets). Downward sloping curve. Shifts due to changes in consumption, investment, government spending, net exports.
  • Aggregate Supply (AS): Firms' ability to produce output given current prices. Shifts when production costs change (e.g., improvements in productivity increase AS, reducing price pressure; increased resource costs/regulations reduce AS).

What Is a Recession and Why Is It Bad?

• Great Recession (2008–2009): Significant global economic upheaval. Major factors:
  • Mortgage Lending: Large increases, especially to subprime borrowers. Buoyant housing market (1990s-early 2000s) doubled house prices.
  • Interest Rate Hikes: Early 2000s. Unsustainable mortgages -> defaults, evictions -> downward pressure on property values.
  • Financial Instruments: Mortgage debt, car loans, credit cards, student loans resold globally as derivatives.
  • Bank Losses: Defaults, falling house prices -> banks/mortgage lenders lost money.
  • Credit Crunch: Derivatives linked to mortgages/property fell in value. Entire financial system severely restricted lending.
• Recession Definition: When GDP falls for six months or more.
• Impact (AD/AS Model, Figure 8.32): Credit crunch -> severe lending restrictions for businesses/consumers. Consumption (C) and investment (I) fall -> Aggregate Demand (AD) shifts inwards (AD1 to AD2). Causes decline in economic output (Y1 to Y2) leading to recession.
• Impact on Individuals (Labor Market):
  • Labor Supply: Individuals willing/able to work at each wage.
  • Labor Demand: Firms willing/able to hire workers at each wage.
  • Recession Impact: Demand for workers falls as firms struggle with sales. Short-term gap between quantity demanded/supplied -> unemployment.
  • Unemployment: Number of people willing/able to work but cannot find jobs.

What Is the Role of the Government in Shaping the Economy?

• Pre-1930s Approach (Classical Economics): Economics focused on individual markets. Problems seen as market disequilibrium, corrected by price changes. Governments practiced laissez-faire (leave it alone). Waited for markets to self-correct.
  • Labor Market Example: Falling demand -> falling demand for workers -> unemployment. Free markets correct disequilibrium via price changes (wages fall).
  • Classical View of Recession (AD/AS Model, Figure 8.34): High unemployment creates downward pressure on wages (from P1 to P2). Falling wages correct labor market, aggregate supply increases (AS1 to AS2). Economy returns to previous output (Y1), labor market equilibrium, though with fewer 'discouraged' workers (not counted as unemployed).
• Classical Priority: Management of inflation, not unemployment (markets fix unemployment).
  • Historical Context: Friedrich von Hayek (1899–1992) and Ludwig von Mises (1881–1973) experienced hyperinflation in Austria (1921–1922), shaping their focus on this problem.
• John Maynard Keynes (1883–1946): British economist, influential policy recommendations.
  • Historical Context: Famously criticized Treaty of Versailles (1919) for demanding punitive reparations from Germany. Interwar economic difficulties in UK, Great Depression (1929) -> The General Theory of Employment, Interest and Money (1936), which brought macroeconomics to forefront of government policy.
  • Keynesian Argument: Central problem was lack of demand. Government (even borrowing) should spend to create jobs, build infrastructure, stimulate growth. This increases aggregate demand, returning economy/labor demand to original levels.
  • Inflation vs. Deflation: Keynes argued both are evils. Deflation (causing unemployment) worse than inflation (injustice to investors), especially in impoverished world. Not necessary to weigh evils, but to shun both.
  • Impact: Keynes's ideas inspired mainstream economic thinking (1940s–1970s) and informed responses to the Great Recession. Debate continues whether governments should focus on free markets or intervention.
• Modern Economic Thought: Nations experimented with communism/state-run economies in 20th century. Today, most communist governments allow market activity (governments struggle to process all information). In democracies, political debate centers on whether/when to intervene in markets. Attitudes/perspectives on these expectations change, influencing voter decisions. (The concept of market failure and government intervention is foundational to understanding modern economic policy debates).