Of course they do. And I have no doubt we'll do it to ourselves. But it isn't happening imminently. And it doesn't have to be a spectacular collapse either. The British Empire, for example, did not spectacularly collapse and they are still a wealthy country today. The biggest reason for that is look at who are "rivals" are at the moment. That's why I keep saying geopolitics is about relative, no absolute, standing. If our current situation means we have the flu, then much of the rest of the world has terminal cancer. If perfection, or near perfection, is the standard, then yes, things don't look very good.