Mass incarceration is the most pressing racial justice issue of our time.

For African American children, in particular, the odds are extremely high that they will have a parent or loved one, a relative, who has either spent time behind bars or who has acquired a criminal record and thus is part of the under-caste - the group of people who can be legally discriminated against for the rest of their lives. For many African American children, their fathers, and increasingly their mothers, are behind bars. It is very difficult for them to visit. Many people are held hundreds or even thousands of miles away from home.

In the 1990s - the period of the greatest escalation of the drug war - nearly 80 percent of the increase in drug arrests was for marijuana possession, a drug less harmful than alcohol or tobacco and at least, if not more, prevalent in middle class white neighborhoods and college campuses as it is in the 'hood.

Today there are more African-Americans under correctional control, in prison or jail, on probation or parole, than were enslaved in 1850, a decade before the Civil War began. There are millions of African-Americans now cycling in and out of prisons and jails or under correctional control or saddled with criminal records. In major American cities today, more than half of working-age African-American men either are under correctional control or are branded felons, and are thus subject to legalized discrimination for the rest of their lives.

One study conducted in Washington, D.C. indicated that 3 out of 4 black men, and nearly all those living in the poorest neighborhoods could expect to find themselves behind bars at some point in their life.

Black men in ghetto communities (and many who live in middle class communities) are targeted by the police at early ages, often before they're old enough to vote. They're routinely stopped, frisked, and searched without reasonable suspicion or probable cause.

I do believe that something akin to a racial caste system is alive and well in America.