Einstein had some interesting thoughts about this, I don't have a reference handy but it boils down to a UN with teeth, effectively a single world government. And I think that that is something I could get behind because countries are not stable enough over a long enough period of time to give us what we need.
Even so, there is a lot of potential for abuse there too and it will most likely never happen because human nature is what it is.
> a single world government. And I think that that is something I could get behind because countries are not stable enough over a long enough period of time to give us what we need.
I assume you would want such a world government to be some form of democracy? If so, it would mean near-zero voice for Australians (0.32% of world population), Germany (1%), The Netherlands (0.21%), UK (0.83%), France (0.83%).
It would, however, mean much more say for Russia (1.7%), China (17.2%), India (17.8%).
What moral code should such a democratic world government adopt? Would it be secular or religious?
Even if we thought that end-state is ideal, I have a very hard time seeing practical steps that get us there other than through bloodshed (similar to how many current nation states got formed). One exception might be a common enemy that unites the vast majority of humans, e.g. an alien invasion.
Given the huge coordination problem of forming and maintaining a single world government (top-down), I would prefer a more bottoms-up, federated approach where secular, democratic, free-ish market, values continue to spread.