Considering there has never been a time in human history where a nation state has not had any opposition from other nation states, I suspect your suggestion is literally impossible.

I guess what you are saying is that nation states are not a good governing structure for progress, into the future? Who are our enemies? The enemies of my country are not necessarily my personal enemies. In fact I quite like many people who come from 'enemy' territories. There is a disconnect between the reality I experience in my everyday life and the one put forward but my/our government/s.

Switzerland has been mostly without enemies for most of its existence.

So about those swiss bank accounts, then...