Dreams puzzled early man, Greek philosophers spun elaborate theories to explain human memory and perception, Descartes postulated that the brain was filled with "animal spirits," and psychology was officially deemed a "science" in the 19th century. In this Fifth Edition, B.R. Hergenhahn demonstrates that most of the concerns of contemporary psychologists are manifestations of themes that have been part of psychology for hundreds-or even thousands-of years. The book's numerous photographs and pedagogical devices, along with its biographical material on key figures in psychology, engage students and facilitate their understanding of each chapter.