I don't think it's accidental either but the way to understand why it's happening is to ask who benefits from it. In most cases it would seem to be, Putin. He benefits from diminishing US, from stopping US support for democracy all over the world.

If the whole world is governed by say 3 dictators they can easily make peace with each other and share the spoils. But they won't because wars will increase their domestic support. Orwell wrote about this.