In this book, one of the world's brain scientists takes us on a dazzling tour that covers such topics as computers, evolution, Descartes, Schrodinger, and the nature of perception, language, and individuality. The book argues that biology provides the key to understanding the brain. Underlying his argument is the evolutionary view that the mind arose at a definite time in history. This book ponders connections between psychology and physics, medicine, philosphy and more.