WE HAVE NOW TRACED HOW FOOD PRODUCTION arose in a few centers, and how it spread at unequal rates from there to other areas. Those geographic differences constitute important ultimate answers to Yali’s question about why different peoples ended up with disparate degrees of power and affluence. However, food production itself is not a proximate cause. In a one-on-one fight, a naked farmer would have no advantage over a naked hunter-gatherer. Instead, one part of the explanation for farmer power lies in the much denser populations that food production could support: ten naked farmers certainly
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