“Prison gangs end up providing governance in a brutal but effective way,” he says. “They impose responsibility on everyone, and in some ways the prisons run more smoothly because of them.” … For example, consider the Aryan Brotherhood – a notoriously brutal organization whose members are often kept alone in cells because they tend to murder their cell mates. You can take the Brotherhood at its word when it declares itself a racist organization, and you can do the same with the Black Guerrilla Family, which preaches race war and calls for the violent overthrow of the government. But Skarbek says that at lights-out in some prisons, the leader of each gang will call out good night to his entire cellblock. The sole purpose of this exercise is for each gang leader to guarantee that his men will respect the night’s silence. If a white guy starts yelling and keeps everyone awake, the Aryan Brothers will discipline him to avoid having blacks or Hispanics attack one of their members. White power is one thing, but the need to keep order and get shut-eye is paramount.