How did environment determine the time line of the development of man?Provide bullet points or full sentences work.  Just say whatever you know...  Also, it might be easier to answer it by...

How did environment determine the time line of the development of man?

Provide bullet points or full sentences work.  Just say whatever you know...  Also, it might be easier to answer it by comparing where and when different types of societies originated and spread according to Jared Diamond.  Thank you!!!

Expert Answers
ladyvols1 eNotes educator| Certified Educator

According to Diamond, the strength and development of man was directly connected to the geography and environment of that culture.  One of the main questions of the growth and strength of a culture was the population within that culture.  Eurasia had an advantage over Australia and the Americas because of their geographical location on the planet.  The progress of man is determined on their ability to share knowledge with, expand production of food and weapons and germs, or conquer their neighbors with technology, germs, and innovation.

Diamond explained it very clearly in a speech he made in the spring of 2007:

“Eurasia's main axis is east/west, whereas the main axis of the Americas is north/south. Eurasia's east/west axis meant that species domesticated in one part of Eurasia could easily spread thousands of miles at the same latitude, encountering the same day-length and climate to which they were already adapted. As a result, chickens and citrus fruit domesticated in Southeast Asia quickly spread westward to Europe; horses domesticated in the Ukraine quickly spread eastward to China; and the sheep, goats, cattle, wheat, and barley of the Fertile Crescent quickly spread both west and east. In contrast, the north/south axis of the Americas meant that species domesticated in one area couldn't spread far without encountering day-lengths and climates to which they were not adapted.”

Hope this helps to answer your question.

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Guns, Germs, and Steel

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