It is the UN doing this. The UN is requiring all nations to form regional blocs that will eventually be absorbed into a world government.
Actually it was President Bush or Condi Rice that said they want to move toward regionalization of international diplomacy instead of the UN general assembly and the UN Sec Council.
Also, atleast in my mind, the UN is full of Socialist Globalists that seek a static state complete with the redistribution of wealth through taxation etc...
However, it appears more and more President Bush is more of a Corporate Globalist which seeks to unify regions and the world through Corporate and Trade structures.
Of course I could be wrong...