I'm curious if one were to be certain nation state and was happy being a completely isolated intranet, that they would just exit such arin or related associations and just create their own governing body of IP allocations? In such a case such an internet would be a completely separate internet right?

I wonder if sanctions may ever apply to the internet itself and we may see a break up of the internet into regional internet's.

And if we want to ensure global connectivity these associations would need to be completely independent and voluntary standard and such fees would be paid to an international standards body not beholden to any particular nation's whims?

What if nations started adding intercontinental NAT gateways acting as the entry and exit points between their national boundaries and the rest of the world.