I expected more science and less supposition and anecdote and small studies used to justify sweeping conclusions. And some parts I found ridiculous. But, there were certainly some interesting points that help to frame feelings and behaviors for non-party animals. So, definitely a book with some value, read carefully with large grains of salt. Personally I don’t think there’s anyone out there who has truly nailed all of the various aspects that make us who we are, and I don’t believe it’s possible.