Misappropriating Jane Jacobs' legacy

An article in Opinion Journal points out that modern urban planners claim to revere her teachings, yet are clearly missing the point:

Modern planners have contorted Jacobs's beliefs in hopes of imposing their static, end-state vision of a city. They use a set of highly prescriptive policy tools — like urban growth boundaries, smart growth, and high-density development built around light-rail transit systems — to design the city they envision. They try to "create" livable cities from the ground up and micromanage urban form through regulation. We've seen these tools at work in Portland, Ore., for more than three decades. But the results have been dismal and dramatic. The city's "smart growth" policies effectively created a land shortage, constricting the housing supply and artificially inflating prices. By 1999, Portland had become one of the 10 least affordable housing markets in the nation, and its homeownership rate lagged behind the national average. It has also seen one of the nation's largest increases in traffic congestion and boasts a costly, heavily subsidized light-rail system that accounts for just 1% of the city's total travel. Not exactly how they planned it.

That's because these planning trends run completely counter to Jacobs's vision of cities as dynamic economic engines that thrive on private initiative, trial and error, incremental change, and human and economic diversity. Jacobs believed the most organic and healthy communities are diverse, messy and arise out of spontaneous order, not from a scheme that tries to dictate how people should live and how neighborhoods should look.