That's how the history is written, yes. And how the history is written...is irrelevant. Where are all these profitable, distant colonies with voices in parliament today? Australia? Canada? Technically not sovereign, but they operate as separate nations. No country in the world fits the description of the U.S. you claim would have otherwise been inevitable, and you don't give this a second thought. The oldest truism is the ephemeral nature of Empire. You let your piecemeal study of history delude you.