Why is it that we care for the dead? The philosopher Diogenes suggested that his corpse simply be tossed over the city wall, but it’s an idea that seems unthinkable. Historian Thomas Laqueur says bodies matter because we’ve decided they do - from prehistoric times, regardless of faith or creed. Laqueur’s book explores the ways we’ve ritualized and remembered the dead throughout history. Friday, he joins Doug to explain how our relationship to the dead has helped shape the modern world.