Why do we do the things we do? attempts to answer that question, looking at it from every angle. He hops back in time, in stages, ultimately ending up at the deep history of our species and its evolutionary legacy. The result is a dazzling tour of the science of human , a majestic synthesis that harvests cutting-edge research across a range of disciplines to provide a subtle and nuanced perspective on why we ultimately do the things we do-- for good and for ill.