ROY BAUMEISTER is Francis Eppes Eminent Scholar and head of the social psychology graduate program at Florida State University. He received his PhD in 1978 from Princeton in experimental social psychology and maintains an active laboratory, but he also seeks to understand human nature in the big picture, such as by tackling broad philosophical problems with social science methods. He has nearly 450 publications. He is among the most widely influential psychologists in the world, as indicated by being cited over a thousand times each year in the scientific literature. His 27 books includeMeanings of Life, Evil: Inside Human Violence and Cruelty, The Cultural Animal: Human Nature, Meaning, and Social Life, Is There Anything Good about Men?,and the forthcoming (with John Tierney) Willpower: The Rediscovery of Humans’ Greatest Strength.