In a more modern context, the diplomats in question might be the speech and debate teams of my previous post, multiplied and cross-pollinated around the world to create a more even sense of a spherical playing field. These exchange student circuits do not undermine long established demographics however. There's not much a handful of outsiders might do, to tip any big scales. These are not the invading hordes. Just because your community hosts a few Africans or Asians or Americans or Australians, doesn't make you a "sell out" or a "shill" for some competing continent. That's just too stupid a game to merit our diplomats' talents. They've got bigger (and better) fish to fry.
In recent storyboards, I'm back to eying those former USAF and USN bases in the Philippines, thinking how "girl scout math" could gain a footprint in that ecosystem. This is a variant on the GIS / GPS intensive curriculum elsewhere called "off your duff" math, and involving geo-caching. I've got a couple new essays in this genre on tap at Math Forum: Of Backpacking and Sphere Packing, and Of Mathematics and Outdoor School.