Well, Bill Hicks(RIP) was quite a fan of the idea, but look where it got him, died of stomach-cancer by the age of 33
On a serious note, many people wish for that, but the big boys (goverments, enterprises and what not) + the general public doesn't want it all. Man is too complex (or stupid) for those ideas, it's still the old "we where here first", "Our religion is the way, and everybody should convert", "Our race/culture is superior to yours" and other geopolitical spheres of interest, which are mostly concentrated on who has the best natural resources and technology.
Luckily, the US is the superpower right now, atleast there you can theoretically change the overal international policy every four years. Still better than the other theocratic and totalitarian states out there.