“Room for Debate”: Would Ending the War on Drugs Resolve Racial Imbalance in the Prison System?

The New York Times “Room for Debate” feature this week addresses the racial imbalance in incarceration rates, providing a range of opinions on the question:

The news for young black men is not good: they are disproportionately singled out for discipline in school, they are more likely to be stopped and frisked by New York City police officers, and according to Michelle Alexander in her book, “The New Jim Crow,” nearly one-third of black men are likely to spend time in prison at some point in their lives.

Would pulling back on draconian drug laws or legalizing marijuana be enough to fix this imbalance? What else needs to be done?