In this paper, Benjamin Lessing argues that prison gangs present three distinct problems for policymakers. First, many typical responses to prison-gang activity have unintended and deeply counterproductive consequences. Second, it is unclear that reducing incarceration rates or improving prison conditions would neutralize the authority that prison gangs have accumulated as a result of mass-incarceration policies. And, finally, it is not clear that reducing prison-gang authority would produce positive outcomes.