Over the last thirty years, the prison population in the United States has increased more than seven-fold to over two million people, including vastly disproportionate numbers of minorities and people with little education. For some racial and educational groups, incarceration has become a depressingly regular experience, and prison culture and influence pervade their communities. Almost 60 percent of black male high school drop-outs in their early thirties have spent time in prison. In Punishment and Inequality in America, sociologist Bruce Western explores the recent era of mass incarceration and the serious social and economic consequences it has wrought.