On: The first humans arrived in North America a lot earlier than believed

[plandis]

Guns, Germs, and Steel is a decent introduction (at least the arguments were fairly compelling)

[tshaddox → plandis]

I read that about five years ago! It's what made me realize how little I knew. Granted, there are apparently some big problems with the book (it's quite popular to hate on the book), which I accept, but I think I can still have enjoyed the heck out of it without treating it as gospel.

[lambdaphagy → tshaddox]

GG&S persuasively argues that human subpopulations spent a lot of time in very different environments.

But what tends to happen to populations that spend thousands of generations in very different environments? Diamond is curiously silent on this point.