Since forever, philosophers, economists, and conspiracy theorists have devised any number of elaborate theories on the nature of society and the motivations of human behavior. From the ideas of Adam Smith to Karl Marx, most of these models depend (at least somewhat) on the idea of rational human actors working to achieve reasonable results for themselves, their community, or society. But they are wrong.Similarly, there have been volumes written about how you should successfully relate to other people—but most assume that the person you’re talking to is a relatively intelligent, functional person, even though they probably aren’t. You probably aren’t,...