I assume no such causation. I do assume a correlation, which is brought about by evolution: cooperation beats conflict.

? I think evolution has shown that the bigger stick beats the smaller stick. Genghis Khan has something like 16 million male direct descendants.

But that's besides the point. A thriving meme does not imply a meme "good" for us, any more than a thriving virus implies a virus that is "good" for us.

I don't understand your "simpler rejection" as stated.

Sting: And when their eloquence escapes you, their logic ties you up and rapes you.

Or to say it another way, "I can't refute an argument" <> "The conclusions of the argument are true." The fact that you can't see why it's wrong does not make it true. The fancier and shmancier an argument is, the more this applies.