The Moral Animal : Why We Are, the Way We Are: The New Science of Evolutionary Psychology

An accessible introduction to the science of evolutionary psychology and how it explains many aspects of human nature. Unlike many books on the topic,which focus on abstractions like kin selection, this book focuses on Darwinian explanations of why we are the way we are--emotionally and morally. Wright deals particularly well with explaining the reasons for the stereotypical dynamics of the three big "S's:" sex, siblings, and society. [via]