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.

Kids are growing up in communities in which they see their loved ones cycling in and out of prison and in which they are sent the message in countless ways that they, too, are going to prison one way or another. We cannot build healthy, functioning schools within a context where there is no funding available because it's going to building prisons and police forces.

For those who say that the war on drugs and the system of mass incarceration really isn't about race, I say there is no way we would allow the majority of young white men to be swept into the criminal justice system for minor drug offenses, branded criminals and felons, and then stripped of their basis civil and human rights while young black men who are engaged in the same activity trot off to college. That would never be accepted as the norm.

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.

More than 2 million people found themselves behind bars at the turn of the twenty-first century, and millions more were relegated to the margins of mainstream society, banished to a political and social space not unlike Jim Crow, where discrimination in employment, housing, and access to education was perfectly legal, and where they could be denied the right to vote.

People charged with drug offenses, though, are typically poor people of color. They are routinely charged with felonies and sent to prison.

We must muster the courage, we must find the will, we must do what is necessary to build a truly transformative movement that will end the history and cycle of caste in America.