In this episode, Xavier Bonilla has a dialogue with Dominic Packer about group identities. They start the conversation by discussing his partnership with Jay Van Bavel and their reasons for writing the book. The define identity and why it is an important construct. They discuss the delineation between self and personality and discuss in-group vs. out-group constructs. They mention the concept of cooperation with group identities and mention some of the classic social psychology experiments. They talk about group identity with political polarization, optimal distinctiveness, and the importance of dissent. They also talk about the need for healthy group identities and many other topics. 
Dominic Packer is a Social Psychologist, Professor and Associate Dean for Research and Graduate Programs in Arts and Sciences at Lehigh University. His main focus areas are on dissent, cooperation, and group identities. His book, with co-author Jay Van Bavel, is The Power of Us: Harnessing Our Shared Identities to Improve Performance, Increase Cooperation, and Promote Social Harmony, which can be purchased here. Their book also has a website. Twitter: @dominicpacker_