The systems have been in place for so long, most people can't even accept that there could be anything else. That being said, if even one place changed successfully, who knows?

Pour the world's military budget AND resources for 5 years into anything that could benefit everyone, such as clean energy, and the world has been changed faster than it ever has been. Try that and people will never agree to go back to petty fights amongst world leaders which can and are indeed intended to end with death on a huge scale.