55. Jared Diamond on the Downfall of Civilizations — and His Optimism for Ours

He’s the award-winning author of hugely popular books like Guns, Germs, and Steel; Collapse; and Upheaval. But Jared actually started his varied career as an expert on gallbladders and birds. The physiologist turned geographer talks with Steve about his brushes with death, why the Norse Greenlanders wouldn’t eat fish, and why he has never been invited to a cannibal ceremony.