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.

Certainly youth of color, particularly those in ghetto communities, find themselves born into the cage. They are born into a community in which the rules, laws, policies, structures of their lives virtually guarantee that they will remain trapped for life. It begins at a very early age when their parents themselves are either behind bars or locked in a permanent second-class status and cannot afford them the opportunities they otherwise could.

If the drug war was waged in those communities it would spark such outrage that the war would end overnight. This literal war is waged in segregated, impoverished communities defined largely by race, and the targets are the most vulnerable, least powerful people in our society.

A massive new penal system has emerged in the past few decades - a penal system unprecedented in world history. It is a system driven almost entirely by race and class.

I was inspired by what students have done in some schools organizing walkouts protesting the lack of funding and that sort of thing. There are opportunities for students to engage in those types of protests - taking to the streets - but there is also writing poetry, writing music, beginning to express themselves, holding forums, educating each other, the whole range.

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.

What has changed since the collapse of Jim Crow has less to do with the basic structure of our society than with the language we use to justify it. In the era of colorblindness, it is no longer socially permissible to use race, explicitly, as a justification for discrimination, exclusion, and social contempt. So we don't. Rather than rely on race, we use our criminal justice system to label people of color "criminals" and then engage in all the practices we supposedly left behind.