Los Angeles today is a city in secular decline. Its current political leadership seems determined to turn the sprawling capitalist dynamo into a faux New York. But they are more likely to leave behind a dense, government-dominated, bankrupt, dysfunctional, Athens by the Pacific.

The greatness of Los Angeles stemmed from its willingness to be different. Unlike Chicago or Denver or New York, the Los Angeles metro area was designed not around a central core but on a series of centers, connected first...