"Nationalism is the biggest disease on the planet. Nations have the wrong granularity. They’re too small to be global and too big to be local, and all they can think about is competing." - Nicholas Negroponte
What is the much more efficient boundary of government that is not a nationstate ?
Something is going to break. And we generally wake up and fix thing only after things break.
I say another 5-10 manning/snowden type events before we transition from the united states of america to the the united states of earth.
National identities, as complex as they are and as huge an improvement over religions as they are to serve for the above purpose, are still artificial constructs that in many ways create arbitrary boundaries, introduce and perpetuate differences that are not necessary to exist between people and in some cases have even been manipulated and used by governments for political reasons.