Neighborhoods are important sites of growing class segregation. - Robert D. Putnam

Upper-class parents enable their kids to form weak ties by exposing them more often to organized activities, professionals, and other adults. Working-class children, on the other hand, are more likely to interact regularly only with kin and neighborhood children, which limits their formation of valuable weak ties.

Rehabilitate ex-prisoners, keeping in mind that the prison population is comprised of young men with very little education, poor job records, and frequent histories of mental illness and substance abuse.

Most fundamentally, school systems need to put higher quality teachers in poor schools under conditions in which they can actually teach and not just keep order.