My dog sometimes acts in an aggressive way because he feels he has to protect my family like we're his pack. I find it interesting that although he lives in an environment very different from what would be natural, he still feels the need to do this because of his instinct. He feels that the world is in his control and is oblivious to politics and other issues that affect the whole world.
How do we know that we are any different to my dog? We assume that he knows very little about the world, but he probably thinks the same about us and so how can we know that the world isn't actually being run by him?
Or if not by him how do we know that everything we think we control and understand isn't actually in the control of ants, or plants, or stars?
Or tiny pieces of tinfoil! One way to think about your question is from the day-to-day point of view of ordinary knowledge. From that point of view, we know -- or take ourselves to believe reasonably -- that your dog doesn't run the world because there isn't the slightest evidence that he does and a good deal of evidence that he doesn't. Unless I'm much mistaken, your dog shows the usual signs of doggly limitations. We seem much better at manipulating him than vice-versa. Most of what we do doesn't have any obvious connection with anything that Poochie shows the slightest signs of caring about. In fact, there's no reason to think that Poochie has much of anything in the way of thoughts about who controls what or about what we think. (Poochie probably doesn't have a "theory of mind," as some people say.) Another way of taking your question is as a humorous way of asking how we know anything at all. In some weak sense of "possible," it's possible that the whole world is under the control of...