“This report is the product of three years of research conducted by one of the nation’s leading criminologists, experienced criminal justice lawyers, and statistical researchers. First, we conducted an in-depth examination of the federal and state criminal codes, as well as the convictions and sentences of the nationwide prison population (1.46 million prisoners serving time for 370 different crime categories) to estimate how many people are currently incarcerated without a sufficient public safety rationale. We find that alternatives to incarceration are more effective and just penalties for many lower-level crimes. We also find that prison sentences can safely be shortened for a discrete set of more serious crimes.”