Chris W. Surprenant and Jason Brennan argue that the U.S. criminal justice system grew to the size that it is owing to the incentives faced by prosecutors, judges, police, and federal, state, and local legislators. Each had a solid but narrow reason to act the role that they did in recent decades, yet taken together, their actions produced a system that locks up more people than any other nominally free country. As incentives created the problem, Surprenant and Brennan recommend a set of policies that will align incentives toward de-incarceration.