Stephen Walt and others assume that the presence of aliens would cause humans to form a natural balancing coalition. I'm not so sure. My research into other apocalyptic scenarios suggests that some humans -- that's right, I'm looking at you, Switzerland! -- would bandwagon with the aliens. Indeed, for all we know, some humans are already trying to welcome their future alien overlords. Which begs the question -- wouldn't Hawking's isolationist policy allow the quislings to monopolize the galactic message emanating from Earth?