Jean M. Twenge, PhD, a professor of psychology at San Diego State University, is the author of more than a hundred scientific publications and several books based on her research, including Generations, iGen, and Generation Me. Her research has been covered in Time, The Atlantic, Newsweek, The New York Times, USA TODAY, and The Washington Post. She has also been featured on Today, Good Morning America, Fox and Friends, CBS This Morning, and NPR. She lives in San Diego with her husband and three daughters.

W. Keith Campbell, Ph.D., Associate Professor of Psychology at the University of Georgia, is the author of more than 65 scientific journal articles and book chapters and the book, When You Love a Man Who Loves Himself: How to Deal with a One-way Relationship (Sourcebooks, 2005). He has published more than 30 journal articles and chapters on narcissism, more than any other academic researcher. He is also a contributing author of the study on the rise in narcissism covered by the Associated Press. His research has appeared in USA Today, Newsweek, and The Washington Post, and he has been featured on Fox News’ The Big Story and made numerous radio appearances. He holds a BA from the University of California at Berkeley, an MA from San Diego State University, and a Ph.D. from the University of North Carolina at Chapel Hill. He lives in Athens, Georgia, with his wife and daughter.