The International Centre for Prison Studies recently published a list of countries and their prison populations. The US is number one. Our prominence on the list is embarrassing for those Americans and the rest of the world who see the United States as a humane and progressive country. But the numbers give one pause. Why do we spend more money on prisons than on schools, for a starter? Clearly our model of criminal justice is one of retribution and not rehabilitation. Study after study has shown that changing behavior is much more cost effective than locking people up for decades, living, as it were, on the state. Check out the numbers.