AMUSING, INTERESTING, OUTRAGEOUS, or PROFOUND

That's a good question, and I don't necessarily have a complete answer for you. What I'm talking about is something radically new. It's never really been done before, at least not to the extent that I'm talking about. We have the UN, but the UN isn't really what I'm talking about. I'm talking about some kind of government.

Perhaps something sort of like the US Federal government. Not exactly like the US Federal government, obviously, more like what the US Federal government was originally conceived by some to be. Today it's more like a centralized national government, but it was originally intended to be much more limited in scope, just to enforce very basic laws and to arbitrate on interstate matters. But states themselves were meant to be mostly autonomous.

In that regard I suppose enforcement would be carried out by a military-police force, made up of volunteers from the various member nations. Their authority would be limited to enforcing what few laws the hypothetical Federal government might pass, which could be limited to a relatively small number of constitutional laws.

For instance, perhaps one of the constitutional laws of this hypothetical, international Federation would be to outlaw genocide. If this hypothetical Federal government, made up of elected representatives from the constituent member nations, determined that the government of one of the nations was carrying out a genocide, the Federal military-police force could intervene to stop it. Perhaps take the leader of the government into custody to stand trial.