The United States does have the highest rate of incarceration in the world dwarfing the rates of even highly repressive regimes like Russia, China or Iran. This reflects a radical shift in criminal justice policy, a stunning development that virtually no one - not even the best criminologists - predicted forty years ago.

It's important to teach students about the reality of the system, that it is in fact the case that they are being targeted unfairly, that the rules have been set up in a way that authorize unfair treatment of them, and how difficult it is to challenge these laws in the courts. We need to teach them how our politics have changed in recent years, how there has been, in fact, a backlash. But we need to couple that information with stories of how people in the past have challenged these kinds of injustices, and the role that youth have played historically in those struggles.

Prison guard unions have become the powerful political forces in some states, particularly California.

The rules and reasons the political system employs to enforce status relations of any kind, including racial hierarchy, evolve and change as they are challenged.

In the war on drugs, state and state law enforcement agencies have been rewarded in cash by the federal government - through programs like the Edward Byrne Memorial Grant program - for the sheer numbers of people arrested for drug offenses.

For many, whether they go to prison or not is far less about the choices they make and far more about what kind of cage they're born into.

The New Jim Crow: Mass Incarceration in the Age of Colorblindness.