How Skyscrapers Can Save the City
Besides making cities more affordable and architecturally interesting, tall buildings are greener than sprawl, and they foster social capital and creativity. Yet some urban planners and preservationists seem to have a misplaced fear of heights that yields damaging restrictions on how tall a building can be. From New York to Paris to Mumbai, there’s a powerful case for building up, not out.
by Edward Glaeser
In the book of Genesis, the builders of Babel declared, “Come, let us build us a city and a tower with its top in the heavens. And let us make a name for ourselves, lest we be scattered upon the face of the whole earth.” These early developers correctly understood that cities could connect humanity. But God punished them for monumentalizing terrestrial, rather than celestial, glory. For more than 2,000 years, Western city builders took this story’s warning to heart, and the tallest structures they erected were typically church spires. In the late Middle Ages, the wool-making center of Bruges became one of the first places where a secular structure, a 354-foot belfry built to celebrate cloth-making, towered over nearby churches. But elsewhere another four or five centuries passed before secular structures surpassed religious ones. With its 281-foot spire, Trinity Church was the tallest building in New York City until 1890. Perhaps that year, when Trinity’s spire was eclipsed by a skyscraper built to house Joseph Pulitzer’s New York World, should be seen as the true start of the irreligious 20th century. At almost the same time, Paris celebrated its growing wealth by erecting the 1,000-foot Eiffel Tower, which was 700 feet taller than the Cathedral of Notre-Dame.
The ceaseless climb of the world's skyscrapers is a story of ever-evolving challenges. Here's how we reached the heights we have—and where we might go from here.
Since that tower in Babel, height has been seen both as a symbol of power and as a way to provide more space on a fixed amount of land. The belfry of Trinity Church and Gustave Eiffel’s tower did not provide usable space. They were massive monuments to God and to French engineering, respectively. Pulitzer’s World Building was certainly a monument to Pulitzer, but it was also a relatively practical means of getting his growing news operation into a single building.
For centuries, ever taller buildings have made it possible to cram more and more people onto an acre of land. Yet until the 19th century, the move upward was a moderate evolution, in which two-story buildings were gradually replaced by four- and six-story buildings. Until the 19th century, heights were restricted by the cost of building and the limits on our desire to climb stairs. Church spires and belfry towers could pierce the heavens, but only because they were narrow and few people other than the occasional bell-ringer had to climb them. Tall buildings became possible in the 19th century, when American innovators solved the twin problems of safely moving people up and down and creating tall buildings without enormously thick lower walls.
Elisha Otis didn’t invent the elevator; Archimedes is believed to have built one 2,200 years ago. And Louis XV is said to have had a personal lift installed in Versailles so that he could visit his mistress. But before the elevator could become mass transit, it needed a good source of power, and it needed to be safe. Matthew Boulton and James Watt provided the early steam engines used to power industrial elevators, which were either pulled up by ropes or pushed up hydraulically. As engines improved, so did the speed and power of elevators that could haul coal out of mines or grain from boats.
But humans were still wary of traveling long distances upward in a machine that could easily break and send them hurtling downward. Otis, tinkering in a sawmill in Yonkers, took the danger out of vertical transit. He invented a safety brake and presented it in 1854 at New York’s Crystal Palace Exposition. He had himself hoisted on a platform, and then, dramatically, an axman severed the suspending rope. The platform dropped slightly, then came to a halt as the safety brake engaged.
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