[There is a] perverse form that public investment takes in many poor, minority neighborhoods: million dollar blocks." Our penchant for incarcerating people has grown so strong that, in many cities, taxpayers frequently spend more than a million dollars locking away residents of a single city block. There are 851 blocks in Chicago where the public has committed more than a million dollars to sentencing residents to state prison. The total tops a million dollars for nonviolent drug offenses alone in 121 of those blocks. Most of Chicago's incarcerated residents come from and return to a small number of places. And in those places, the consequences of incarceration on everyone else - children who are missing their parents, households that are missing their breadwinners, families who must support returning offenders who are now much harder to employ - are concentrated, too. Million-dollar blocks exist too in New York and New Orleans and many big cities. When the spatial concentration of all this money is mapped ... the picture poses a critical question: What would happen if we poured the same resources into these same struggling parts of any city in very different ways? What if we spent $2.2 million dollars not removing residents from the corner of West Madison and Cicero but investing in the people who live there? Evidence suggests that such investments could do more to deter crime than locking people away.