You might find the early 20th century Oxford sociologist JD Unwin an interesting read. Though, you may have to make due with a blogpost (albeit a well-written one w/ cited sources) summarizing J.D. Unwin's writing. I still need to acquire the text the below post makes use of. (EDIT: Looks like it's up as a pdf)

https://www.kirkdurston.com/blog/unwin

Essentially, civilizations that experience a "flourishing" of sexual freedom collapse in several generations.

You might find the early 20th century Oxford sociologist JD Unwin an interesting read. Though, you may have to make due with a blogpost (albeit a well-written one w/ cited sources) summarizing J.D. Unwin's writing. I still need to acquire the text the below post makes use of.

https://www.kirkdurston.com/blog/unwin

Essentially, civilizations that experience a "flourishing" of sexual freedom collapse in several generations.