No, I don't believe in the concept of nation states. What began in 1648 should have died in 1918. Unfortunately, it didn't.
As for alternatives, well, plenty to chose from. I'm sure Lord of Flies could give a treatise in one of them
For myself, I know what I wish for only would come about as a result of a cataclysmic event, so I don't get my hopes up. A meritocratic society based on a significantly smaller human population, delegating menial/hazardous tasks to automatons and robots.
Not bloody likely to ever happen. Unlike some idealists, my head is still attached to my shoulders