This brief explains how Congress and the president can best help reduce our country’s outsized reliance on imprisonment. Successful interventions will need to target issues that previous efforts have overlooked or ignored, and they will need to take better account of the haphazard ways that costs, benefits, and responsibilities are fractured across city, county, state, and federal governments. If designed properly, however, federal efforts could play an important role in pushing our criminal justice system to adopt more efficient, as well as more humane, approaches to managing and reducing crime.