As long as we humans act as individuals, and pretty much having an "opinion", peace will NEVER occur. The differences between the different races and religions of the human race are way too important to change. These opinions form the basis of argumentation, and argumentation leads to eventual violence which in tail ends up in war and in death. Now I'm not saying it always ends up like that, but that's just how it is. If people don't like it, they should kill themselves, because NOBODY on earth has never had an argument over a particular subject. Even if some nations decided right now to form a "peace coalition" to bring peace to the world, there will always be somebody there to try and take it down. There is no way to attain total peace as long as the human race exists. It is in the nature of humans to be aggressive, heck, why do babies cry? To gain attention because they need something (it's their weapon [yea I know stupid example :P]). The only way to attain peace, is for everyone to destroy eachother, and then there will be no more humans, no more "opinions". However that peace, nobody will witness, because we'll all be gone.