W3 PS 169 - Reading Flash Cards

What is Sowell’s central thesis regarding geographic equality vs. geographic determinism?

Geography is not egalitarian (physical settings vary radically and prevent equal economic opportunities), but there is no geographic determinism because physical settings interact with changing human knowledge, technology, and culture over time.

What is the difference between direct and indirect economic effects of geography?

Direct effects impact living standards directly (soil, water). Indirect effects determine whether a group is isolated or connected to a wider "cultural universe" to share tech and break human inertia.

Why is the Zaire River economically inferior to the Mississippi or Yangtze despite having more water?

Tropical Africa's high plateau ("mesa" form) forces the Zaire to plunge through 30+ cataracts and waterfalls, blocking continuous long-range commercial transport.

Where are Mollisols (highly fertile soils) primarily located, and what is their significance?

Located almost exclusively in temperate zones (Eurasian belt, U.S. Midwest/Plains, temperate South America); they provided the foundation for agricultural and urban development.

How do climate, soil, and evaporation interact to create regional disparities?

Sunlight and heat evaporate water rapidly (e.g., 80% of African rain is lost to evaporation; 23 inches of rain keeps England lush but requires irrigation in sunny Jerusalem/Palermo).

Why was agriculture a prerequisite for civilization and urban advancement?

Agriculture allowed sedentary populations to feed dense urban cities, which historically generated the vast majority of scientific, technological, and cultural advances.

What three historical examples illustrate the massive cost advantage of water transport over land transport?

1) In 1830, moving 1 ton 300 miles by land cost $30+ vs. $10 for 3,000 miles across the Atlantic. 2) Tiflis imported oil 8,000 miles by water from the U.S. rather than 340 miles over land from Baku. 3) Pre-railroad San Francisco was reached cheaper from China than overland from the Missouri River.

Why did Africa's smooth coastline hinder economic development compared to Europe's jagged coast?

Europe's jagged coast features deep harbors, islands, and peninsulas (>1/3 of its land area), allowing easy docking. Africa's smooth coast and shallow waters lack natural harbors, forcing expensive offshore cargo unloading.

How do Eastern and Southern European rivers compare disadvantageously to Western European rivers?

Western rivers flow slowly into open seas, kept ice-free by the Gulf Stream. Eastern/Russian rivers freeze longer and empty into isolated inland seas or the Arctic; Mediterranean rivers dry up under hot summer suns (except the Po River).

What is the universal economic and social pattern of mountain communities worldwide?

Because rain washes soil off slopes into scattered valleys, mountain regions universally experience isolation, fragmentation ("Balkanization"), subsistence farming, poverty, and cultural lag.

What are the four major ways mountains act as a boon to people living in the lowlands below?

1) Catch windward rain and originate all major rivers (leaving a leeward "rain shadow"). 2) Store winter snow that melts gradually to sustain lowland rivers during dry summers. 3) Provide falling water for hydroelectricity. 4) Originated key food staples (potatoes, wheat, corn, beans).

Why have warnings that the world is "running out" of natural resources (like 1970s oil warnings) repeatedly failed?

They confuse finite physical limits with nearing those limits, and ignore that human knowledge turns new materials into resources (furthermore, exploration costs mean companies only verify ~12 years of reserves at a time).

What geographic windfall enabled the ancient cradles of agriculture (Mesopotamia, Egypt, Indus, North China) to thrive?

Annual river floods automatically replenished soil nutrients each year, preventing the nutrient depletion that forced slash-and-burn farming elsewhere.

What interacting geographic factors handicap agriculture in sub-Saharan Africa?

Shallow topsoil, dryness that makes chemical fertilizers harmful, wetlands infested with malaria/river blindness, and long dry spells followed by torrential downpours that wash away topsoil.

Why have the highest recorded temperatures on every continent occurred outside the tropics (30°-40° latitude)?

Temperate zones feature longer summer daylight hours (15 hours of sun vs. 12 at the equator) allowing massive heat buildup, combined with cloudless desert skies (unlike cloudy tropical regions that reflect sunlight).

Why do groups transplanted from temperate zones to the tropics often outperform indigenous tropical populations?

Temperate winters forced an inescapable survival challenge: systematic food storage and future planning. This forged "human capital" (time urgency, self-discipline, and saving) that was unnecessary in year-round tropical climates.

Why didn't pre-Columbian Native Americans use wheeled vehicles or large ships (even though Mayans invented wheels for toys)?

The Americas completely lacked horses, oxen, and heavy draft animals (Andean llamas were small pack animals). Without draft animals to pull carts or haul cargo to ports, wheeled transport and large ships were economically unviable.

How did the presence vs. absence of horses create a massive disparity in cultural universes between Eurasia and the Americas?

Horses carried Asian inventions 8,000 miles across Eurasia, enabling vast empires. In contrast, pre-Columbian American states had zero contact with regions hundreds of miles away (e.g., Mesoamerica had no contact with Andean empires).

How did the tsetse fly impact sub-Saharan Africa's development?

The tsetse fly carries a disease fatal to horses and oxen, preventing animal-assisted transport and farming. This forced humans to carry loads on their heads and contributed to severe isolation and extreme linguistic fragmentation.

Why did Europeans colonize the Americas centuries before sub-Saharan Africa despite knowing of Africa longer?

Eurasian trade gave Europeans biological resistance to lethal epidemics that wiped out 50%+ of unexposed Native Americans. Conversely, temperate Europeans had zero immunity to tropical African diseases (where white life expectancy was <1 year) until 19th-century medicine conquered them.