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27 Dec 07

The world goes to town | Economist.com

- article published in May 2007; "After this year the majority of people will live in cities. Human history will ever more emphatically become urban history, says John Grimond." Rural contribution to human progress has been slight compared to urban contributions.

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cities john_grimond megacities the_economist trends urbanization

the rural contribution to human progress seems slight compared with the urban one. Cities' development is synonymous with human development. The first villages came with the emergence of agriculture and the domestication of animals: people no longer had to wander as they hunted and gathered but could instead draw together in settlements, allowing some to develop particular skills and all to live in greater safety from predators. After a while the farmers could produce surpluses, at least in good times, and the various products of the villagers—grain, meat, cloth, pots—could be exchanged. Around 2000BC metal tokens, the forerunners of coins, were produced as receipts for quantities of grain placed in granaries. Not coincidentally, cities began to take shape at about the same time.
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- But bread, in the broadest sense, was important. People came to cities not just to worship but to trade—the shrine was often the market, too—and the goods they bought and sold were not just farm products but the manufactures of urban artisans and skilled workers. The city became a centre of exchange, both of goods and of ideas, and so it also became a centre of learning, innovation and sophistication.
- Whatever the particular circumstances of a city, though, its vigour was likely to be affected by technological change. Just as it was improvements in farming that brought about the surpluses that made possible the first fixed settlements, so it was improvements in transport that made possible the development of trade on which the prosperity of so many cities depended. Other technological changes made it possible to survive in a city. The Romans, for instance, constructed aqueducts to bring fresh water to their towns and sewers to provide sanitation.
- But only the rich benefited. Most Romans, and many city-dwellers throughout history, lived in squalor, and many died of it. Towns were crowded and insanitary; people were often malnourished; and disease spread fast. Though cities grew in size and number for long periods, they could decline and fall, too. Between 1000 and 1300 Europe's urban population more than doubled, to about 70m (thanks partly to a new system of crop rotation, made possible by better tools). Then, with the Black Death, it fell by a quarter. Country people died too, but the city-dwellers were especially vulnerable. Their health depended above all on clean water and sanitation, which few had, and cheap soap and medicines, which had yet to be invented.
- Not surprisingly, the next big change in the development of the city also turned on a leap in technology: the invention of engines and manufacturing machinery. The Industrial Revolution did nothing at first to make urban life easier, but it did provide jobs—lots of them. With the new factories of the industrial age that began in the late 18th century was born an entirely new urban era. Peasants left the land in their multitudes to live in new cities, first in the north of England, then all over Europe and North America. By 1900, 13% of the world's population had become urban.
  
  The latest leap, from 13% to 50% in just 107 years, also owes something to science and technology: improvements in medicine, coupled with new knowledge about ways to avoid disease, have enabled more and more people to live together without succumbing as once they did to diarrhoea, tuberculosis, cholera and other pestilences. The same developments, however, have similarly lengthened lives in the countryside, leading to a huge increase in rural population. Human ingenuity has not matched this increase with commensurate growth in rural prosperity. As a result, ever more villagers have been upping sticks to seek a better life in the city.
- The sheer scale and speed of the current urban expansion make it unlike any of the big changes that have punctuated urban history. It mostly consists of poor people migrating in unprecedented numbers, and then producing babies on a similarly unprecedented scale. It is thus largely a phenomenon of poor and middle-income countries; the rich world has put most of its urbanisation behind it.
- Greater Tokyo already has 35m, more than the entire population of Canada.
- In the rich world, though, the city is undergoing very different changes. Many of the new towns that flourished in the Industrial Revolution and the manufacturing era that followed have been losing population. Even New York, for so long the epitome of urban sophistication, went through a bad patch in the 1970s. Some cities retain their role as administrative centres, by virtue of their political status. Some are still trading hubs, by virtue of their geographical position. Some endure simply because they have reached an equilibrium. But others struggle.
  
  Of the traditional reasons for urban living, several (the presence of the shrine, the proximity of food) have lost their importance. Some of what the city provided (shops, factories) can now be offered in suburban malls or industrial parks—or in low-cost urban rivals in the developing world. Security, once one of the main reasons for huddling together, is often now more elusive in the druggy streets of the metropolis than in the exurbs. And technology, which has usually favoured urban progress, now enables people to work in rural bliss on home computers. No wonder so many cities find that in order to flourish they have to reinvent themselves.