Dr. Greene discusses his famous experiments elucidating the neurobiology of common moral dilemmas, i.e. the trolley thought experiments. Dr. Greene is a pragmatist who discusses his book on the tendencies for humans to separate into tribes and amplify the differences between us and them. We discuss the classic experiment of the Robbers Cave.\n\n\nPurple Mattress: Get a free pillow by texting DREW to 474747\n\nTheraworx Relief: Learn more at TheraworxRelief.com/home\n\nTrueCar: Visit TrueCar to enjoy a more confident car-buying experience\n\nHydralyte: Visit Hydralyte.com/DrDrew and use the code DREW18\n\nPluto TV: Download now on all your favorite devices