Fascinating. I've added that to my Sony Reader wishlist. I thought that might be the book you were talking about in the other thread - it sounds like it's along the same lines as Sway: The Irresistible Pull of Irrational Behavior by Ori and Rom Brafman, which is a short, easy but well-annotated and very enlightening read.

But then when I took Maidei to the Great Circle Mound this afternoon and stopped in the gift shop, I saw a (600 page) book that really tied in with a couple of others about human physical and cultural evolution that I've read recently. So I grabbed that ... I'm already in the middle of a novel ... and now my stack of unread books is piling up again.