Peter Gray is a research professor of psychology at Boston College who has conducted and published research in neuroendocrinology, developmental psychology, anthropology, and education. He is author of an internationally acclaimed introductory psychology textbook, which views all of psychology from an evolutionary perspective. Much of his research focuses on the role of play in human evolution and how children educate themselves, through play and exploration. He has expanded on these ideas in his book, Free to Learn. He also authors a regular blog called Freedom to Learn, for Psychology Today magazine and is president of the nonprofit Alliance for Self-Directed Education.