Anthropologist Peter Turchin explains how the seeds of Brexit unrest were planted during the Carolingian Empire

The Brexit vote caught most elite observers by surprise and has spurred a flurry of talk of further possible defections from the EU. But one person who was not so surprised was Evolution Institute Vice President Peter Turchin, an evolutionary anthropologist at the University of Connecticut, author most recently of “Ultrasociety: How 10,000 Years of War Made Humans the Greatest Cooperators on Earth.”