The Accidental Anarchists Great Cities That Grew Without a Plan

Imagine you are standing in a narrow alley somewhere in the old city of Naples. The street is barely wide enough for two people to pass each other sideways. Above your head, laundry lines connect one building to the next, clothes swaying in the warm air. A woman leans out of a window four floors up, calling something down to a vendor below. The vendor, who has been selling vegetables from the same corner for twenty years, shouts back without looking up. A cat sits precisely in the middle of the path, indifferent to everything. The buildings pressing in around you are a geological record of centuries — a Roman foundation here, a medieval arch there, a baroque facade bolted on top of something nobody can quite explain. Nothing matches. Everything works.

Now imagine you are standing in Brasilia. It is 1960, and the brand-new capital of Brazil has just been inaugurated to tremendous fanfare. Designed from scratch by the visionary architect Oscar Niemeyer and urban planner Lúcio Costa, it is breathtaking from the air — a city shaped like an airplane, or a bird in flight, depending on who you ask. The government ministries line up in perfect modernist symmetry. The roads are broad and rational. There is not a single unnecessary alley, not a single accidental corner. It is, by any aesthetic measure, a masterpiece.

And yet, within a decade, residents were complaining that it felt like a ghost town. That there was nowhere to simply wander. That the city, for all its grandeur, was somehow not quite alive.

These two cities pose a question that urban thinkers, architects, anarchist philosophers, and complexity scientists have been wrestling with for generations. How do cities actually come to life?