By Britt Gillette:

This global government will emerge in our generation because current technological trends will soon make it inevitable. The catalyst for this consolidation of global political power will be the development of molecular manufacturing (MM), a revolutionary technology of unprecedented capability and strength. It’s a technology that could arrive as soon as tomorrow and almost certainly will arrive within the next decade.

BS, MM will not arrive tomorrow, and probably not in the next decade (maybe in the next two), but if it does, I believe that global government is indeed probable, whether you like it or not. Go read Nanosystems. Even if MNT is implausible, hijacked ribosomes would still give rise to exponential manufacturing, so even “soft machines” could lead to the ability to build millions of missiles in less than a couple years. The crucial effects are the exponentiality and programmability.

Anon points out that “a multinational organization willing and able to keep the peace” might also occur. However, it would need to be a heck of a lot more potent than the UN. Whether or not it would be a global government might be a matter of definition.