This is the classic text on the psychology of persuasion. Robert Cialdini is a professor of both psychology and marketing at Arizona State University. He’s one of the world’s leading experts on the psychology of persuasion. The book is simultaneously kind of a consumer protection guide (how not to be duped) AND a manual for marketers (how to sell your stuff!). Cialdini has identified six core psychological principles of persuasion. We take a quick look at each, how they can be used for good or ill and how to apply the wisdom to our lives today.