I know what you mean, but that again in today's world that is utopian because you have several Persian empires. As soon as one country would dissolve on something like that the regions would become prey to the large neighboring countries that didn't dissolve etc. I kind of doubt something like that is achievable in present day, most close to that would be that if at one point in future we have a unified world government federalized to self-governing regions that are still subject to the world government (i mean i think the world and human civilization is moving in that direction what so ever).