The world is in the midst of a city-building boom

Africa’s tallest building is rising under empty skies. Beneath the Iconic Tower in northern Egypt sits a city that officials expect to one day house 6.5m people. For now, though, it is mostly empty—like the desert that came before it.Egypt’s “New Administrative Capital” is part of a rush of city-building. Firms and governments are planning more settlements than at any time in the post-war period, with many already under construction. Ninety-one cities have been announced in the past decade, with 15 in the past year alone. In addition to its new capital in the north, Egypt is building five other cities, with plans for dozens more. India is considering eight urban hubs. Outside Baghdad, Iraq, workers have just broken ground on the first of five settlements.