In his new book, Steven Pinker studies the human mind. What is it? How did it evolve? How does it enable us to see, think, feel, laugh, interact with others, have aesthetic experiences, and reflect on our own lives? This is the long-awaited synthesis encompassing all the major explanations offered by evolutionary biology and the cognitive sciences concerning mental life of human beings. Steven Pinker heads the Center of Cognitive Neurosciences at the Massachusetts Institute of Technology. He is the author of the highly acclaimed Language Instinct.