Book review: Triumph of the City

some of these modern cities may horrify us. They shouldn't, says Glaeser they are signs of growth, energy and aspiration. Cities are our best and brightest hope. This idea has had more than two hundred years of resistance. Not long after the Industrial Revolution began in Britain, the Romantic poets turned away from the smoke and factories of their cities to celebrate the air and light of untouched nature. In 19th-century America, the writer Henry David Thoreau retreated to the wilderness of Walden Pond to live the solitary, simple life, and convinced generations of Americans that cities were bad and nature was good. They had, Glaeser admits, a point. The early industrial cities were dirty, since they lacked efficient waste disposal systems, and disease spread rapidly among the population. But more importantly they were profitable, and there were enormous commercial incentives to make them work, as well as political ones. Their transformation could be achieved at a stroke: in the second half of the 19th century, the French Emperor Napoleon III gave Baron Haussmann unrestricted power to turn the slum-infested city of Paris into one of the wonders and delights of the modern world. Or the transformation could be done by…