The United States now accounts for less than 5 percent of the world’s inhabitants—and about 25 percent of its incarcerated inhabitants. In 2000, one in 10 black males between the ages of 20 and 40 was incarcerated—10 times the rate of their white peers. In 2010, a third of all black male high-school dropouts between the ages of 20 and 39 were imprisoned, compared with only 13 percent of their white peers.
