I thought about this question when it comes to Anarchy.
How long would it take for majority to adapt to anarchy, that is start to follow rational non-aggresive principles. And majority of the destructive forces to be forced out of market by consumer choise?
That is if we were to start now?
We started over 3 billion years ago and we are still working on it.
So we can only hope we are done in 5 billion years...