Get Ready for the Great Urban Comeback

The 21st-century city is the child of catastrophe. The comforts and infrastructure we take for granted were born of age-old afflictions: fire, flood, pestilence. Our tall buildings, our subways, our subterranean conduits, our systems for bringing water in and taking it away, our building codes and public-health regulations—all were forged in the aftermath of urban disasters by civic leaders and citizen visionaries.

Natural and man-made disasters have shaped our greatest cities, and our ideas about human progress, for millennia.