The Philadelphia studies suggest that place-based interventions are far more likely to succeed than people-based projects. “Tens of millions of vacant and abandoned properties exist in the United States,” write Branas and his team. Remediation programs “make structural improvements to the very context within which city residents are exposed on a da

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disadvantaged neighborhoods with higher levels of “collective efficacy”—the stuff of loosely linked neighbors who trust one another and share expectations about how to make their community better—have lower crime rates.3 A single eviction could destabilize multiple city blocks, not only the block from which a family was evicted but also the block t

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This order created uncoordinated systems that worked, without staff, as if by magic. Such was Jacobs’s “Sidewalk Ballet.” With density, she argued, came “eyes on the street,” a community-based security system that required neither barbed wire nor an extensive police presence. With wide sidewalks comes trusted interactions, even with strangers—a qua... See more