I do believe that the answer is decentralization through nationalism, but even as Trump was promoting and facilitating the very idea you describe, He was promoting the US as a leading the world into that and also being that beacon of freedom. He was not touting a world where we are just another run of the mill country. I read your post correctly. I know what you are saying. I'm just saying a leader will just naturally rise up. That leader will either be a benign leader like a Constitutional US, or an authoritarian one like a Communist China.