I agree with the first sentence, I disagree with the second. Few countries managed more than a century of world domination and the US is already showing the classic signs of decay.
So? The Roman Republic managed to expand its holdings even as it was decaying into the Empire.
As per a recent comment this thread is meant to voice contrarian opinions, that is anything this community tends not to agree with. Thus I ask you to post your contrarian views and upvote anything you do not agree with based on personal beliefs. Spam and trolling still needs to be downvoted.