Psychologist Michael McCullough joins the show to talk forgiveness, punishment, and how we came to care about the welfare of people we don't know. Also: a listener calls out our dubious math.Special Guest: Michael McCullough.Sponsored By:The Great Courses Plus: The Great Courses Plus is a Video-On-Demand service brought to you by The Great Courses – the leading global media brand for lifelong learning and personal enrichment. With thousands of in-depth videos taught by the world’s greatest professors, you’ll always have something fascinating to learn about. Promo Code: BEERSLinks:Broad Reach - Stonehooker Brewing CompanyStone IPA | Stone BrewingMegadeth BeerTorpedo - Citrus, Pine & Floral IPA | Sierra Nevada Brewing Co.Tuesday - Burdock - UntappdMichael McCulloughThe Kindness of Strangers: How a Selfish Ape Invented a New Moral CodeMaxence Cyrin - Where is my mind