Grains and Human Evolution

[Update 8/2011: as I've learned more about human genetics and evolution, I've come to appreciate that many Europeans actually descend from early adopters of agriculture more than they descend from the hunter-gatherers that previously occupied Europe.  Also, 10,000 years has been long enough for significant genetic adaptation.  Read The 10,000 Year Explosion for more information].You've heard me say that I believe grains aren't...