In the 2012 Zócalo Book Prize lecture, sociologist Richard Sennett, author of Together: The Rituals, Pleasures and Politics of Cooperation, discusses how today's diverse societies can learn to cohere. Cooperation is a craft, he argues, that we can learn--but we must develop certain skills in order to do so: dialogical listening skills, using the subjunctive voice, and practicing empathy rather than sympathy.