This fascinating, provocative book explores the mysteries of human thought and behavior, using reverse engineering--determining what natural selection designed the mind to accomplish in a hunting-and-gathering environment--to explain how the mind stores and uses information. Illustrations.This fascinating, provocative book explores the mysteries of human thought and behavior, using reverse engineering--determining what natural selection designed the mind to accomplish in a hunting-and-gathering environment--to explain how the mind stores and uses information. Illustrations. Winner of L.A. Times Book Prize (Science/Technology) 1997. Short-listed for National Book Critics Circle Award (General Nonfiction) 1997.