I happen to be reading #BirthOfTheUnitedStates by #IsaacAsimov and he observes that in the 1780’s, the colonies made decisions to cede claims (on territories stretching out to the Mississippi) to the nascent federal government.
He hypothesized that if they *hadn’t* done so, the early United States would have just devolved similarly to European sovereignties of the Westphalian era.