This is never going to happen because the current nuclear powers keep abusing their power to benefit themselves. Look at Ukraine. They were effectively invaded and part of their territory annexed. There is nothing that can be done because Russia is a nuclear power. Or look at Libya or Iraq or Afghanistan. All of these invasions are backed by the threat of nuclear weapons.

It's not even too much to say that the only really sovereign countries are countries with nuclear capabilities or the ability to acquire them very quickly.