In 2009, Chicago spent millions of dollars to create programs to prevent gang violence in some of its most disadvantaged neighborhoods.
While public officials and social scientists often attribute the violence - and the failure of the programs - to a lack of community in poor neighborhoods, closer study reveals another source of community divisi.
Yet in spite of the programs, violence has grown worse in some of the very neighborhoods that the violence prevention programs were intented to help.
In 2009, Chicago spent millions of dollars to create programs to prevent gang violence in some of its most disadvantaged neighborhoods