I don't think it would matter even if the us did have to start again. The entire us alliance after ww2 benefited from the same structural causes of increased pluralism and egalitarianism. A fractured elite, complex international trade, expanding and increasingly difficult to control communication channels, and a growing bureaucracy. These all inhibit autocratic concentration of power. International trade became uncomplicated, there is one manufacturer that is not a consumer, and many consumers. This leads to an increasingly less fractured elite. The structural reasons for democracy and rules based order are all fading. The us is just a really big canary.