This book is the definitive biography of the most influential American psychologist of his generation. Drawing upon a vast store of hitherto unpublished correspondence, interviews, and exhaustive research in more than 30 archival collections, Mechanical Man is the most authoritative full-length biography of Watson to be published to date. This carefully documented study provides a degree of accuracy unattained in previous accounts of Watson's life and work. Moreover, it places the development of behaviorism and Watson's career within the context of American social and cultural history.