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 the new HERGENHAHN'S AN INTRODUCTION TO THE HISTORY OF PSYCHOLOGY, noted author Tracy Henley shows you that most of the concerns of contemporary psychologists are manifestations of themes that have recurred for hundreds—or even thousands—of years. Photographs and learning tools, along with fascinating biographical material on key figures in Psychology, engage you and aid your understanding.