I would actually argue that yes, humans _have_ conquered the world. As in: we are now at the top of the food chain and decide which habitats and which animals

I would actually argue that yes, humans _have_ conquered the world. As in: we are now at the top of the food chain and decide which habitats and which animals get to live and which don't. Because we are the most intelligent being on the planet. In our pursuit to that place, we've used other animals with lesser intelligence to our advantage (dogs, horses, ...) The premise is that an AI with super-human intelligence could use us in the same way. And to be honest, we're really not that hard to manipulate or persuade (money, religion, blackmail, power, ...)