I think humans are analogous to a body with cancer. Generally I think (hope) most people want peace and prosperity for themselves, other humans, animals, nature, etc. However we have within our population a growing disease. This diseased element is willing to harm, consume and destroy it's host, (the planet and everything on it), without regard for it's own long term survival, just like a cancer. I don't think this has ever been more true than now. AI on the other hand (if it ever really comes to pass) is very unlikely to bring about it's own destruction. Quite the contrary, it will likely evolve and grow and overtake. If it's really intelligent, it will purge us from the planet.