Our great, global cities are turning into vast gated citadels where the elite reproduces itself

At the New Cities Summit I had a coffee with Saskia Sassen of Columbia University, leading thinker on cities. That took some doing: Sassen arrived from Bogotá that morning, and was flying to Zurich hours later. “Cities were poor,” she told me, in between. “In the 1970s London was broke, New York was broke, Tokyo was broke, Paris was much poorer than now. And the built environment was a bit run down.”

But from the 1980s, these cities recovered. An increasingly complex financial sector needed more sophisticated networks of lawyers and accountants. Corporate mergers and takeovers meant global headquarters got concentrated in fewer places. Crime declined, making cities less scary. And so great cities grew richer. Fancy architects put up lovely buildings. House prices rose.

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All through history, bright young people migrated to metropolises: think of Dick Whittington, the semi-mythical medieval English country boy who ended up mayor of London. But today Dick wouldn’t be able to afford a bedsit in London. He’d have to turn down an internship. To buy in these cities now, you must either earn a fortune or inherit a house there – and often the same people do both. Outsiders who reach the city late rarely have the education and contacts to succeed.

Inevitably, the one per cent in the global city shapes national policies. Sassen mentions core features of the “neoliberal project”, such as deregulating finance or privileging control of inflation over job growth. “The work was done in Wall Street, the City of London,” she says. Elite opinion-formers, who live in global cities alongside financiers (albeit in smaller flats), assured the little people that these policies would help everyone.

Sassen sighs: “The capture by a very small number of cities of a lot of the excitement and wealth produced by the system – this is a problem.” Outside these hubs, things are less desirable. Most western cities have lost manufacturing. Market towns struggle as small-scale agriculture fades. A few secondary cities (Lyon, Denver, Bristol) thrive. Most don’t. Even cities as prominent as São Paulo, Moscow or Johannesburg may prove too violent or congested to succeed. “You also have cities that simply die – Detroit,” adds Sassen. But if they’re out in the sticks, nobody powerful will hear them scream.