Throughout the United States, it takes three times as many hours of training to become a nail technician, a barber, or a plumber as it does to become a police officer. Finland, Australia, Denmark, and Germany – countries with far less crime and a fraction of American gun violence – spend dramatically more to prepare officers before sending them off into the streets. Finland, for instance, provides police cadets with 5,500 hours of training, nearly 14 times the minimum 408 training hours required by the state police board in Georgia. Highly trained law enforcement officers, studies consistently show, are better...