Virgil Zeigler-Hill, PhD, is an associate professor and the director of graduate training for the Department of Psychology at Oakland University, Rochester, Michigan. He has written more than 2 journal articles and book chapters that focus on these topics. Dr. Zeigler-Hill has edited two previous books: Self-Esteem and Evolutionary Perspectives on Social Psychology. He is currently an associate editor for Self and Identity, Journal of Personality Assessment, and Evolutionary Psychology. David K. Marcus, PhD, is a professor and the chair of the Department of Psychology at Washington State University, Pullman. He is the author of more than 75 journal articles. Much of his work focuses on psychopathy and antisocial behavior, but his research interests are diverse and include studies on spitefulness, hypochondriasis, psychotherapy outcomes and processes, and interpersonal perception. He is currently the editor of Group Dynamics and serves on the editorial boards of Psychological Assessment and the Journal of Social and Clinical Psychology.