For the rest of their lives, [black men] can be denied the right to vote, automatically excluded from juries, and legally discriminated against in employment, housing, access to education and public benefits. So many of the old forms of discrimination that we supposedly left behind during the Jim Crow era are suddenly legal again once you've been branded a felon.

Defenders of the system will counter by saying this drug war has been aimed at violent crime. But that is not the case. The overwhelming majority of people arrested in the drug war have been arrested for relatively minor, non-violent drug offenses.

Of course in this age of colorblindness, a time when we have supposedly moved "beyond race," we as a nation would feel very uncomfortable if only black people were sent to jail for drug offenses. We seem comfortable with 90 percent of the people arrested and convicted of drug offenses in some states being African American, but if the figure was 100 percent, the veil of colorblindness would be lost.

Arguably the most important parallel between mass incarceration and Jim Crow is that both have served to define the meaning and significance of race in America. Indeed, a primary function of any racial caste system is to define the meaning of race in its time. Slavery defined what it meant to be black (a slave), and Jim Crow defined what it meant to be black (a second-class citizen). Today mass incarceration defines the meaning of blackness in America: black people, especially black men, are criminals. That is what it means to be black.

The war on drugs has been the engine of mass incarceration. Drug convictions alone constituted about two-thirds of the increase in the federal prison population and more than half of the increase in the state prison population between 1985 and 2000, the period of our prison system's most dramatic expansion.

I think it's important to encourage young people to tell their own stories and to speak openly about their own experiences with the criminal justice system and the experiences of their family. We need to ensure that the classroom environment is a supportive one so that the shame and stigma can be dispelled.

What defenders of the system typically fail to acknowledge is that the reason violent offenders comprise a fairly large percentage of the state prison population is because they typically receive longer sentences than non-violent offenders.