I’m a Professor in the Dept. of Psychology and a member of the Center for Brain Science faculty. I was an undergrad at Harvard (Quincy House, Philosophy, ’96), went to Princeton for my PhD (Philosophy, ’02), stayed at Princeton to learn more about psychology and neuroscience as a post-doc, and then came back to Harvard to start my lab in 2006. Much of my research has been on the psychology and neuroscience of moral judgment, with a focus on the interplay between emotion and reason in moral dilemmas (“trolley problems”). My current social scientific research examines strategies for improved social decision-making, reducing intergroup/political animosity, and advancing effective altruism. My current neuroscientific research aims to understand the “language of thought”, how the brain combines concepts to form complex ideas. I teach in the GenEd program and am the author of Moral Tribes: Emotion, Reason, and the Gap Between Us and Them. I’m working on a new book aimed developing scalable strategies for reducing intergroup conflict and broadening the scope of human cooperation.