Poverty in America is an enormous problem. According to the U.S. Census Bureau, 15 percent of Americans, or 46.5 million people, lived below the poverty line in 2012. And the poor are increasingly isolated across America. As Sean Reardon and Kendra Bischoff have documented, between 1970 and 2009 the proportion of poor families living in poor neighborhoods more than doubled, from 8 to 18 percent. And the trend shows no signs of abating. This increasing concentration of poverty poses a host of problems to communities. Less advantaged communities suffer not just from a lack of economic resources but from everything from higher crime and drop-out rates to higher rates of infant mortality and chronic disease. -more-