Last weekend, on the bucolic Quad at Harvard University—typically, the site of a casual game of Ultimate, or perhaps an afternoon reading of some Shakespearean sonnets before English class—an unusual and, to some, frightening scene was played out. There were people throwing things! And running! And jumping! And most scary of all, every single one of them was black. So the Harvard students watching from their dormitory windows, growing increasingly agitated at the sights below, did what any normal, white Harvard student would do when they saw a large, seemingly unruly group of black people: They called the cops!