The main problems America has are internal. I agree that nobody could realistically invade us or wage war against us, but that doesn't mean we can't have civil

The main problems America has are internal. I agree that nobody could realistically invade us or wage war against us, but that doesn't mean we can't have civil conflicts or a period like the Troubles. In those cases, our overwhelming military superiority might be a drawback since everybody and their cousin is armed.