On September 2, 2008, a group of leading sovereign wealth funds (SWFs) agreed on generally accepted principles and practices. The process that created the so-called Santiago Principles is important in its own right, as a milestone on the way to what might become international financial architecture. Since SWFs rose to prominence two years ago, they have been trapped in sterile domestic arguments between national security and open investment. These have obscured SWFs\u27 significance and the governance challenge they present. The challenge reflects the power shifts and culture clashes of financial integration, which, thanks to capital flow reversals, no longer looks like an exercise to remake the world in the Anglo-American image. Integratio...