You have to take the long view. First, when Moses came down from Mt. Sinai, man has already progressed to the point where a commandment against cannibalism was no longer necessary. And, second, it's like pissing on a boulder. For the first few thousand years, you don't see any effect. But after that, you start to see a definite impact.
I. F. StoneIf you want to know about governments, all you need to know is two words: Governments lie.
I. F. StoneThe only kinds of fights worth fighting are those youโre going to lose, because somebody has to fight them and lose and lose and lose until someday, somebody who believes as you do wins.
I. F. Stone