> Maybe if we had one government we’d finally be able to settle on one electrical plug, which side of the road to drive on etc.

That's nice, but seeing how the wast majorities of crimes against humanity are made by too powerful nation states against their inhabitants I am not very exited to see what atrocities an even more powerful would do.

At least now if the local government are trying to kill you there's a small chance that you might manage to escape to a safer place.