Right, I mean the Roman Republic declined and gave way to Roman Empire for a long time before Rome finally waned. That doesn't feel like it would be a good time for the rest of the world if the United States gave way to the United Empire for next 500 years.

Nuclear annihilation will go restrain growth outside of obvious geographic spheres in theory.

Industry was not globalized in the previous regimes of pre-World war imperialism. That is the novel difference now. And China requires globalized trade in order to support its overindustrialization and economy.

America also currently requires it because it doesn't have its industrial base anymore. It will probably re-industrialize over the next coming decades but that's something that happens over decades.

However, I feel the new rise of imperialism also marks the end of civilization's historical memory of industrial warfare of the world wars.

And that is a very very bad thing