I'm in China right now. Every time I return, I am amazed at how drastically the skyline has changed. The pace of construction here is dazzling. In fact, I've seen estimates that as many as 75% of the world's construction cranes are in China. What were empty lots now contain office towers and condominium complexes so tall that you can't see the top of the buildings through the smog. The quaint hutongs, or traditional residential lanes and small streets that originated during the Yuan Dynasty (1271-1368), have been razed and replaced with shopping malls. The reason for the juggernaut growth is simple: China Is Experiencing the Largest Human Migration in the History of Mankind Reminiscent of other industrial revolutions around the world, a massive tidal wave of working class Chinese from ...