Christopher D. Green is a professor of psychology at York University. He is the coauthor of Early Psychological Thought: Ancient Accounts of the Mind and Soul and the coeditor of The Transformation of Psychology: Influences of 19th-Century Philosophy, Technology, and Natural Science. Ludy T. Benjamin Jr. is a professor of psychology at Texas A&M University and the author and editor of numerous books, including A History of Psychology in Letters and A Brief History of Modern Psychology.  Contributors: David Baker, Frank G. Baugh, Günther Bäumler, Angela H. Becker, Ludy T. Benjamin Jr., Stephen F. Davis, Donald A. Dewsbury, Alfred H. Fuchs, Stephen T. Graef, Christopher D. Green, C. James Goodwin, Matthew T. Huss, and Alan S. Kornspan.