John D. DeLamater was Conway-Bascom Professor of Sociology, Emeritus, at the University of Wisconsin-Madison until his death in December 2017. He received his education at the University of California, Santa Barbara, and at the University of Michigan. He earned his PhD in social psychology in 1969, after which he began teaching an undergraduate course in social psychology in 1970. He added graduate courses and seminars in the area beginning in 1981, and over his career, Dr. DeLamater won several teaching awards, including the Chancellor’s Award for Distinguished Teaching. He was also the co-editor of the Handbook of Social Psychology, published by Springer. Dr. DeLamater had been co-author of this text since its first edition. Jessica L. Collett is Professor of Sociology at the University of California, Los Angeles. She is an award-winning instructor, most recently receiving the Charles E. Sheedy Award for Excellence in Teaching from the College of Arts and Lecturers at the University of Notre Dame, where, prior to her position at UCLA, she was on the faculty between 2006 and 2018. She regularly teaches social psychology at both the undergraduate and graduate levels, as well as introductory sociology and a course on socialization and the life course. Her research focuses on small group processes, self and identity, and the connection between the two. Steven Hitlin is Professor of Sociology and Criminology at the University of Iowa, where he teaches courses in social psychology, sociological theory, morality, and the life course. He is co-author, with Matthew Andersson, of The Science of Dignity (Oxford University Press 2023) and, with Sarah K. Harkness, of the award-winning Unequal Foundations: Inequality, Morality, and Emotions across Cultures (Oxford University Press 2018). Dr. Hitlin’s research interests stretch between social psychology, self and identity, morality, social theory, and the life course.