Covid-19 has turned cities' main economic assets into their worst enemies

The Covid-19 outbreak has radically altered our conception of large cities. The density and connectedness of urban areas, once viewed as key economic strengths, now appear as weaknesses that put citizens at greater risk from the virus. Rune Dahl Fitjar asks whether this change in perceptions is likely to be temporary, or whether we may see a lasting shift toward a less global, less urban and, ultimately less prosperous world.