[AlexandrB]

> Unfortunately it seems that cultural aspects like accepting homosexuality...

Are you aware of the research that correlates homosexual traits in men with higher fertility in women from the same genes[1]? These factors are not a strict net-negative. In addition, "culture" isn't transmitted genetically. You could spread a culture with below replacement reproductive rates if the culture was persuasive enough. There's not a "democracy" gene that suddenly emerged and spread from 17th century England. It was the ideas that spread.

[1] https://www.newscientist.com/article/dn6519-survival-of-gene...