http://blogs.ft.com/the-world/2008/12/and-now-for-a-world-government/#axzz1TzcGgcp3

I have never believed that there is a secret United Nations plot to take over the US. I have never seen black helicopters hovering in the sky above Montana. But, for the first time in my life, I think the formation of some sort of world government is plausible. A "world government" would involve much more than co-operation between nations. It would be an entity with state-like characteristics, backed by a body of laws. The European Union has already set up a continental government for 27 countries, which could be a model. The EU has a supreme court, a currency, thousands of pages of law, a large civil service and the ability to deploy military force. [Um, How about we use the U.S. Constitution as a model rather than a mess like the EU? Good idea, in some distant millenium when humanity is civilized.]