How broken? The numbers are stark:

• The United States has 5% of the world's population, yet possesses 25% of the world's prison population;

• More than 2.38 million Americans are now in prison, and another 5 million remain on probation or parole. That amounts to 1 in every 31 adults in the United States is in prison, in jail, or on supervised release;

• Incarcerated drug offenders have soared 1200% since 1980, up from 41,000 to...