Douglas T KenrickDouglas T. Kenrick, PhD, is the author of The Rational Animal and Sex, Murder, and the Meaning of Life. He has published over 200 scientific articles, books, and chapters, the majority applying evolutionary ideas to human behavior and thought processs. His textbook Social Psychology: Goals in Interaction, with Steven Neuberg, Robert Cialdini, and David Lundberg-Kenrick, is now in its seventh edition. He has appeared in numerous documentaries as well as on The Oprah Winfrey Show, and has written for the New York Times and Scientific American. His Psychology Today blog, titled Sex, Murder, and the Meaning of Life, has been visited by 4.6 million readers. Read More Read Less