I think the goal IS one world govt.
however, I think it'll be the US at the steering wheel when it happens.
The russians, opec, south america... obstacles.
EU will play ball. Aussies too. Africa as well.
And I think it'll be a gradual thing done by corporatism until those nations that don't play ball either get starved out (as we'll be able to do with china possibly), or until nanotechnology arrives and just makes "food and oil machines" an easy thing to make.