The Year 1000An authoritative rethinking of global history by a leading Yale professor. When did globalization begin? Most observers have settled on 1492, the year Columbus discovered America. But as celebrated Yale professor Valerie Hansen shows, it was the year 1000, when for the first time new trade routes linked the entire globe, so an object could in theory circumnavigate the world. This was the 'big bang' of globalization, which ushered in a new era of