On this podcast, for years we’ve discussed issues such as conspiracy theories, mis- and disinformation, polarization, and the ways in which the design and incentives on today’s technology platforms exacerbate them. Today’s guest is Calum Lister Matheson,  associate professor and chair of the Department of Communication at the University of Pittsburgh and a faculty member of the Pittsburgh Psychoanalytic Center. He's the author of Post-Weird: Fragmentation, Community, and the Decline of the Mainstream, a new book from Rutgers University Press that applies a different lens on the question as he searches for insights into the seemingly inexplicable behaviors of communities such as serpent handlers, pro-anorexia groups, believers in pseudoscience, and conspiracy theorists that deny the reality of gun violence in schools.