
There is a reason Eurasia ran the table for most of human history, and it has nothing to do with the people who lived there.
Jared Diamond’s argument in Guns, Germs, and Steel is that the continent runs east to west. Crops, animals, and tools spread along a single band of climate. Same latitude, same growing season, no adaptation needed. Something invented in one place worked a thousand miles away on day one. The Americas run north to south. Cross a few hundred miles and the climate flips, so every good idea had to be reinvented before it could travel. One continent compounded its knowledge. The other kept starting over.








