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.

In my view, the critical questions in this era of mass incarceration are: What disturbs us? What seems contrary to expectation? Who do we really care about?

Nothing has contributed more to the systematic mass incarceration of people of color in the United States than the War on Drugs

Our system of mass incarceration is better understood as a system of racial and social control than a system of crime prevention or control.

Once you're labeled a felon, the old forms of discrimination - employment discrimination, housing discrimination, denial of the right to vote, denial of educational opportunity, denial of food stamps and other public benefits, and exclusion from jury service - are suddenly legal. As a criminal, you have scarcely more rights, and largely less respect, than a black man living in Alabama at the height of Jim Crow. We have not ended racial caste in America; we have merely redesigned it.

All people make mistakes. All of us are sinners. All of us are criminals. All of us violate the law at some point in our lives. In fact, if the worst thing you have ever done is speed ten miles over the speed limit on the freeway, you have put yourself and others at more risk of harm than someone smoking marijuana in the privacy of his or her living room. Yet there are people in the United States serving life sentences for first-time drug offenses, something virtually unheard of anywhere else in the world.

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.