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From a column at Bloomberg.com:

With gasoline at $4-plus a gallon, lots of thinking people see the U.S. undergoing a vast demographic shift, with millions of people moving back to cities. The suburbs, and those places beyond the suburbs, the exurbs, will dry up and blow away.

The notion appeals especially to people who like to think they’ll be in charge after the revolution. They would apparently love nothing more than for the population to be confined to Soviet-style concrete-block high-rises and be forced to take state-run streetcars to their little jobs at the mill.