Study Notes on the Origins of Agriculture

Origins of Agriculture

Chapter Overview

  • Exploration of how agriculture began, focusing on foraging societies and transition to farming, including domestication and significant sites of early agriculture.

Foraging Societies

Hunter-Gatherers

  • Diet Types:

    • Vegetarian:

      • Example: Hadza of Tanzania

    • Meat-based:

      • Example: Inuits

  • Knowledge of Plant Uses

    • Importance of understanding and calendarizing the usage of various plant species.

Evidence of Foraging

Types of Evidence

  • Carbon Dating

  • Fossils

  • Charred Seeds and Preserved Fruits

  • Microscopic Evidence

    • Includes fibers, pollen, phytoliths (silica structures from plant cells)

  • Coprolites and Middens

    • Evidence from human waste and refuse sites

  • Tools

  • Cave Paintings

Early Foragers

Example: Wadi Kubbaniya, Upper Egypt

  • Time Period: 17,000 to 18,000 years ago

  • Diet Composition:

    • Fruits, seeds, and tubers

    • Consumed wild nut grass tubers

  • Diversity of Diet:

    • 25 different plant species eaten

  • Nutritional Content:

    • High in carbohydrates and fiber, low protein (but of good quality)

Modern Foragers

Example: !Kung San of Kalahari Desert

  • Habitat: Savanna region of Southern Africa

  • Duration in Region: 10,000 years

  • Biodiversity:

    • 100 plant species and 50 game species utilized

  • Diet Composition:

    • 2/3 plant-based; significant resource: Mongongo nut

    • Average intake: 2355 kcal/day and 96g protein

  • Foraging Frequency:

    • Forage approximately 2.5 days per week

  • Gender Division of Labor:

    • Distinct roles in foraging strategies based on gender

Agriculture: Revolution or Evolution?

Theoretical Perspectives

  • Accidental Agriculture:

    • Concept of agriculture being a discovery or unintended result

  • Natural Interaction:

    • Observations of how plants spring from seeds influenced early cultivation practices

Transition from Hunter-Gatherer to Farmer

Requirements for Settled Farming

  • Essential Needs:

    • Plants that can support human diets (calorically and nutritionally)

    • Animals that can provide nutritional support

  • Domestication Factors:

    • Knowledge necessary regarding which plants to cultivate and methods of growth

Cultural Explanations of Plant Cultivation

Universal Beliefs

  • Every culture has provided its own narrative regarding the origins of agriculture, often framed as a “gift” from deities.

  • Examples:

    • Mediterranean Cultures: Goddesses imparting agricultural knowledge

    • Aztec Civilization: Quetzalcoatl, in disguise as an ant, providing corn

    • Inca Civilization: Knowledge from the Father Sun

    • Judeo-Christian Narrative: Narrative of punishment leading to agricultural burdens

Agriculture: Environmental and Cultural Dynamics

Spread and Diffusion

  • Environmental Shifts:

    • Drier climates leading to decreased foraging resources

  • Latitudinal Spread:

    • Agriculture thrives at comparable latitudes globally

    • Favorable east-west continental orientations aid in agricultural expansion

Cultural Diffusion and Migration

Mechanisms of Agricultural Spread

  • Cultural Diffusion:

    • Agriculture transmits across cultures

  • Massive Migration:

    • Groups introduced agricultural practices to new areas

Agricultural Hypotheses

Coevolution Hypothesis

  • Dump Heap Hypothesis (Edgar Anderson):

    • Humans discard refuse near dwellings leading to wild plants germinating, creating “protogardens,” which humans observe and cultivate further.

Cultural Progress Hypothesis (Carl Sauer)

  • Societies with abundant resources assume leisure, allowing them to invent farming as an improvement to their lives.

Population Pressure Hypothesis

  • Growing populations increase food demand, leading to agricultural development.

Agriculture and Beer Hypothesis

  • The significance of stored grains for brewing beer and its cultural context.

Early Agriculture Sites

Key Regions

The Near East

  • Regions: Middle East, Southwest Asia

    • Fertile Crescent and river valleys of Mesopotamia

    • Countries involved: Iraq, Iran, Syria, Turkey, Jordan, and Israel

  • Date Range: 9,000 to 14,000 BP

    • Notable Site: Jarmo, Iraq (9,000 BC)

  • Crops Cultivated:

    • Wheat (varieties: einkorn, emmer), barley, pea, lentil, vetch, and domesticated animals such as cattle, goats, and sheep.

The Far East

  • Early Sites:

    • China

  • Crops:

    • Rice (11,500 years ago, Yangtze River Valley)

    • Millet (8,000 years ago, Yellow River Valley)

    • Domesticated species include pig, silkworm, dog, and horse

Papua New Guinea

  • Sites:

    • 7,000 years ago

    • Region: Highlands, Kuk Swamp of Waghi Valley

    • Transformation of highlands into grassy wetlands fostering banana and sugar cane growth.

Domestication of Species

  • Silkworm Domestication:

    • Species: Bombyx mori

    • Timeline: 5000 years ago with notable gene development allowing for cultivation, improved growth, and inability to flee.

  • Horse Domestication:

    • Location: Central Asia, Kazakhstan

    • Evidence in Botai people's pottery showing tooth wear from bits and bridles, along with milk residue.

  • Dog Domestication:

    • Timeline: 30,000 years ago with origins from a wolf ancestor likely in Eastern Eurasia.

  • Chicken Domestication:

    • Originating from jungle fowl in Southeast Asia, domesticated 3,500 years ago initially as a cultural symbol before becoming livestock.

The New World
Mesoamerica

  • Timeline: 5,500 years ago

    • Region: Tehuacan Valley

  • Crops Cultivated:

    • Squash, avocado, corn, gourd, amaranth, beans, chili peppers, tomato, peanut, guava

  • Domesticated Animals:

    • Turkey, dog, Muscovy duck

    • Guila Naquitz in Oxaca (southern Mexico) with squash domesticated 8,000 to 10,000 years ago.

Central and South America

  • Notable Crops:

    • Squash (coastal Ecuador, 9,000 to 10,000 years ago), chili peppers, llama, alpaca, vicuna, and guinea pig.

North America

  • Timeline: 4,000 years ago

    • Regions: Eastern half of the continent

  • Crops:

    • Sunflower, marsh elder, goosefoot, gourd

Centers of Plant Domestication

Historical Context

  • Global Spread of Crops:

    • Understanding origins crucial to global agricultural practices

  • Nikolai I. Vavilov’s Work:

    • Conducted from 1916 to 1936 emphasizing regions with the greatest crop diversity as original cultivation sites.

Challenges to Vavilov’s Hypotheses

  • Subsequent findings demonstrating some crops were domesticated multiple times across various regions, questioning the distinctiveness of agricultural origins.

  • Vavilov suffered persecution, imprisoned by Stalin for dissenting against Lysenko, later dying of malnutrition.

Characteristics of Domesticated Plants

Traits and Changes

  • Artificial Selection:

    • Human-driven traits for the benefit include:

    • Non-shattering seed heads (genetic alterations on chromosome #4)

    • Increased size of fruits or seeds

    • Loss of seed dormancy

    • Shift from perennial to annual life cycles

    • Traits that promote retention of seeds over dispersal, higher flavors, and specific textures

  • Physiological Changes:

    • Synchrony in germination (domesticated plants vs. wild)

    • Morphological changes lead to larger, more compact plant forms.

Origins of Civilization

Conditions Leading to Civilization

  • Food Surpluses:

    • Innovations in storage methods (e.g., pits, containers) improved food security.

    • Effects of problem solving in food preservation on community structuring.

  • Civic Structure in Early Civilizations:

    • Earliest evidence traced back to Mesopotamia exhibiting traits such as specialized workers, record-keeping, technological advancements, and advanced urbanization.