Once a thriving metropolis on the banks of the Mississippi, St. Louis, Missouri, is now a ghostly landscape of vacant houses, boarded-up storefronts, and abandoned factories. The Gateway City is, by any measure, one of the most depopulated, deindustrialized, and deeply segregated examples of American urban decay. "Not a typical city," as one observer noted in the late 1970s, "but, like a Eugene O'Neill play, it shows a general condition in a stark...