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| title | chunk | source | category | tags | date_saved | instance |
|---|---|---|---|---|---|---|
| Guns, Germs, and Steel | 3/6 | https://en.wikipedia.org/wiki/Guns,_Germs,_and_Steel | reference | science, encyclopedia | 2026-05-05T08:39:40.618408+00:00 | kb-cron |
Eurasia's large landmass and long east–west distance increased these advantages. Its large area provided more plant and animal species suitable for domestication. Equally important, its east–west orientation has allowed groups of people to wander and empires to conquer from one end of the continent to the other while staying at the same latitude. This was important because similar climate and cycle of seasons let them keep the same "food production system" – they could keep growing the same crops and raising the same animals all the way from Scotland to Siberia. Doing this throughout history, they spread innovations, languages and diseases everywhere. By contrast, the north–south orientation of the Americas and Africa created countless difficulties adapting crops domesticated at one latitude for use at other latitudes (and, in North America, adapting crops from one side of the Rocky Mountains to the other). Similarly, Africa was fragmented by its extreme variations in climate from north to south: crops and animals that flourished in one area never reached other areas where they could have flourished, because they could not survive the intervening environment. Europe was the ultimate beneficiary of Eurasia's east–west orientation: in the first millennium BCE, the Mediterranean areas of Europe adopted Southwestern Asia's animals, plants, and agricultural techniques; in the first millennium CE, the rest of Europe followed suit. The plentiful supply of food and the dense populations that it supported made division of labor possible. The rise of non-farming specialists such as craftsmen and scribes accelerated economic growth and technological progress. These economic and technological advantages eventually enabled Europeans to conquer the peoples of the other continents in recent centuries by using guns and steel, particularly after the devastation of native populations by the epidemic diseases from germs. Eurasia's dense populations, high levels of trade, and living in close proximity to livestock resulted in widespread transmission of diseases, including from animals to humans. Smallpox, measles, and influenza were the result of close proximity between dense populations of animals and humans. Natural selection endowed most Eurasians with genetic variations making them less susceptible to some diseases, and constant circulation of diseases meant adult individuals had developed immunity to a wide range of pathogens. When Europeans made contact with the Americas, European diseases (to which Americans had no immunity) ravaged the indigenous American population, rather than the other way around. The "trade" in diseases was a little more balanced in Africa and southern Asia, where endemic malaria and yellow fever made these regions notorious as the "white man's grave". Some researchers say syphilis was known to Hippocrates, and others think it was brought from the Americas by Columbus and his successors. The European diseases from germs obliterated indigenous populations so that relatively small numbers of Europeans could maintain dominance. Diamond proposes geographical explanations for why western European societies, rather than other Eurasian powers such as China, have been the dominant colonizers. He said Europe's geography favored balkanization into smaller, closer nation-states, bordered by natural barriers of mountains, rivers, and coastline. Advanced civilization developed first in areas whose geography lacked these barriers, such as China, India and Mesopotamia. There, the ease of conquest meant they were dominated by large empires in which manufacturing, trade and knowledge flourished for millennia, while balkanized Europe remained more primitive. However, at a later stage of development, western Europe's fragmented governmental structure actually became an advantage. Monolithic, isolated empires without serious competition could continue mistaken policies – such as China squandering its naval mastery by banning the building of ocean-going ships – for long periods without immediate consequences. In Western Europe, by contrast, competition from immediate neighbors meant that governments could not afford to suppress economic and technological progress for long; if they did not correct their mistakes, they were out-competed and/or conquered relatively quickly. While the leading powers alternated, a constant was rapid development of knowledge which could not be suppressed. For instance, the Chinese Emperor could ban shipbuilding and be obeyed, ending China's Age of Discovery, but the Pope could not keep Galileo's Dialogue from being republished in Protestant countries, or Kepler and Newton from continuing his progress; this ultimately enabled European merchant ships and navies to navigate around the globe. Western Europe also benefited from a more temperate climate than Southwestern Asia where intense agriculture ultimately damaged the environment, encouraged desertification, and hurt soil fertility.
=== Agriculture ===