Here.
Very good essay on the fate of Detroit - and similar cities - by Wretchard: The Field of Dreams. A quote:
Mayor Bing’s plan to build developments recalls nothing so much as the South Seas cargo cults who believed all that was necessary to make the skies rain with goodies was to build a dirt airstrip and palm-leaf control tower to attract resupply flights from somewhere. “If you build it, they will come”.
Who “they” is remains unclear. But they are out there.
As Glenn Reynolds said (who he quotes):
The government decides to try to increase the middle class by subsidizing things that middle class people have: If middle-class people go to college and own homes, then surely if more people go to college and own homes, we’ll have more middle-class people. But homeownership and college aren’t causes of middle-class status, they’re markers for possessing the kinds of traits — self-discipline, the ability to defer gratification, etc. — that let you enter, and stay, in the middle class. Subsidizing the markers doesn’t produce the traits; if anything, it undermines them.
Change rarely comes from the outside, in. Recall "urban renewal." Now, those brownstone "slums" that didn't get torn down go for millions in New York, while the "modern" and "dignified" public housing projects are nightmares, socio-cultural wastelands which even cops are reluctant to enter.