Most people imagine that the explosion in the U.S. prison population during the past twenty-five years reflects changes in crime rates. Few would guess that our prison population leaped from approximately 350,000 to 2.3 million in such a short period of time due to changes in laws and policies, not changes in crime rates. Yet it has been changes in our laws—particularly the dramatic increases in the length of prison sentences—that has been responsible for the growth of our prison system, not increases in crime.
