Dominic Packer is a Professor of Psychology at Lehigh University, and the Associate Dean for Research and Graduate Programs in Arts & Sciences. Much of his research investigates how and why people decide to dissent from their groups, as well as to cooperate with members of other groups. Dr. Packer's writing has appeared in Scientific American Mind, the Washington Post, and Harvard Business Review, and for a time he had a popular blog entitled "It's a Group Life" at Psychology Today. His research has been covered by international media outlets (including the New York Times, the Washington Post, BBC, Daily Telegraph and Psychology Today). He regularly teaches a range of courses, from some of the largest lecture courses at his university to intimate seminars on identity and social change. Jay Van Bavel is an Associate Professor of Psychology and Neural Science at New York University and is affiliated with Management and Organizations in the STERN School of Business. His research draws on everything from neuroscience to social networks to examine how our group identities shape our perceptions and actions. Dr. Van Bavel's writing has appeared in the New York Times, The Wall Street Journal, Harvard Business Review and the Washington Post. He has given a TEDx talk and appeared on Through the Wormhole with Morgan Freeman, as well as Al Jazeera, CBC, Bloomberg News, and The Wall Street Journal.