It's impossible, improbable, and very highly unlikely. We Humans are bastards and will continue being bastards until our robot/alien overlords enslave us all. People have always had selfish vested interests in things. Just like how lions and hyenas and leopards are in competition for food in the wild, it's ingrained in us. Survival of the fittest. Natural selection and stuff. For world peace to occur, every single person has to change their perspective and be more accomodating. What's the probability of that happening? As long as there has been things that happened before and people remember them, there will always be strife.

The best example of this is something I might have read or heard somewhere.. someone said if White Supremacists had their way and absolutely eradicated all black people, the hate wouldn't stop there. Then it'd be "your hair is dark and your eyes aren't blue, you are not truly white." It's a nice thought but would never happen.