No longer are upwardly mobile people fleeing the cities; they're now fleeing from the suburbs back to the cities. And the cities' poor are moving to the suburbs. Moreover, the cities are becoming vital economic growth centers. Density, diversity and innovation go together and the population-dense cities have become talent magnets.

By 2011, America's major cities were growing faster than the suburbs for the first time since Americans began driving.  These are just a few of the revealing facts about America's profound demographic changes and their implications. All from a fascinating article by Richard Florida here.