4. What about the EU, UN, Nato, IMF, WTO, ASEAN? What happens to these, can they be reformed to fit a one world paradigm?

In a unified world civilization it is unlikely that these organizations would be necessary, though some might take on the status of “NGO.” Most, Like the IMF and WTO would probably be rolled into government departments.

If, however, we are looking at the hegemonic model, it is quite possible that the 6 or 7 hegemonic powers (possibly made up of the present "traditional spheres") in relationship with each other, may use many of the above organizations as they now function . Even the UN may continue, perhaps constituting only a “Security Council.”