So which societies have adopted them and it lead to negatives? I would like an example and also an explanation for why these things aren't solved problems in America then?

> Agreed, there's no contradiction in saying the USA is brutal and one of the less brutal regimes in the world, to the point that it's the number one destination from immigrants that can actually choose where to live.

That also does not mean the USA is working and working well for people, hence the millions of suicidal teens. It's possible that no system is working.