Nature vs. Nurture? Massimo and Julia revive the age-old debate in this episode of Rationally Speaking, with special guest Jesse Prinz. Jesse is a professor of philosophy at CUNY and the author of several books, most recently "Beyond Human Nature." The trio debate Jesse's argument that human behavior is far more culturally determined than evolutionary psychologists would have you believe, and in the process explore the question of where morality comes from and how to distinguish between nature and nurture.