In coffee shops, convenience stores, and courthouses across the country, Americans are struggling to agree on why the justice system they have is not the justice system they want. Dramatically different experiences with it frustrate every attempt at a common description of the problem, and the grim consensus that filling prisons and detention centers is almost no one's goal gives no hint to what the solution could be. But recently, analyses such as Michelle Alexander's The New Jim Crow: Mass Incarceration in the Age of Colorblindness and the work of public policy organizations such as...