Starting in late summer 2014, a protest movement known as Black Lives Matter convulsed the country. Triggered by the fatal police shooting of a black teenager in Ferguson, Missouri, the movement claimed that blacks are still oppressed by widespread racism, especially within law enforcement. The police subject black communities to a gratuitous regime of stops and arrests, resulting in the frequent use of lethal force against black men, according to the activists and their media and academic allies. Indeed, America’s police are the greatest threat facing young black men today, the protesters charged. New York’s mayor Bill de Blasio announced in December that he worries “every night” about the “dangers” his biracial son may face from “officers who are paid to protect him.” Less than three weeks later, a thug from Brooklyn, inspired by the nationwide anti-cop agitation, assassinated two New York police officers.