Back when all those asteroid movies were coming out people were saying things like (southernish accent) 'weyell if theyer was an ayasteroid theyen we woulda blowed it to heyell and the world woulda been ahappy agayain.' In other worlds-er-words, we would all come together to embrace that we really are just one species that has been divided many different ways by various people or possibly concepts. For me, I don't think that an asteroid would, pardon my english, do diddley-squat to unite us under one government. I'm in the process of reading the unbelievably good Enders Game, by Orson Scott Card, and he talks about how another alien race has assaulted humanity and almost, almost wiped it out. The end of this future war is upon them, and the temporary world government set up is beginning to fail and soon the world will become what it once was: full of different countries trying to rule the world through force and not through agreement. Is a united (not as in united states, mind you) what we really want in the first place? If one were to be created then one of the first laws would have to be diversity above say, an aryan world, where people could keep their same way of life, their language, their customs while their poor governments and bickering dictators are done away with to be replaced with whatever is deemed the best political system at the time. Is this what the world really wants, or is it too high a standard to ask for? It sounds good but unlikely, maybe the closest to a peaceful utopia that we could get to. But what would do it? Is it going to happen? I think that yes, sooner or later, through force or an extraordinary event (something religious, something extrasolarPlease Register or Log in to view the hidden image!) the world will be united, maybe permanently, maybe temporarily. One thing history has shown me is that no matter how strong the government it always, always falls. There is not a single government on earth that was around when humans began to establish political tribes and converting hunter-gatherers to warriors. So it would take something that has never happened before. What would it be? For me, my guess is an assault or a message from an alien race.