I mean, confederacies are older than monarchies in human history. Even in N. America there was the Iroquois Confederacy right there. Not to take away from the rebellion and the formalization of political philosophy, but this is typical puffery by the ascendent Anglo-Saxons who were looking for a superiority narrative to serve the need of colonial nation-building and subsequently world domination.
At the time? The Revolution-era US was none of the things that the linked article quotes as examples of exceptional greatness. It was a relative backwater, facing internal and external security threats and struggling to get a national government working.
