![]() More than half of humanity now lives in cities, and it’s been incredible successful. ![]() But if cities in the developed world are growing, that is nothing compared to the growth of cities in the devloping world. Glaeser talks about how, in the 19th century, Americans moved into the vast continent, and spread out. In the 21st century we’re moving closer together and taking advangtage of the benefits of being close to each other, and cities are growing tremendously. “At their heart,” he says, “cities are the absence of physical space between people.” And cities are powerhouses of the economy: The three largest metropolitan areas produce 80% of GDP but contain only 13% of population. He is also one of the world’s experts on the nature of cities, and he was invited to set the stage for the TED2012 wish. ![]() Ed Glaeser is a economist at Harvard, and the author of Triumph of the City, and as his business casual look he wears a bow-tie with ice-cream cones. ![]()
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