I honestly struggled to think of what would be a valuable way to have this discussion and it seems like there’s no way to avoid a flamewar.
The only thing I would add is that the English anthropologist Chris Knight wrote extensively about “sex strikes” (which goes beyond the simple act of sex of course, into the entire structural notion of child rearing as a social function) being the driver of cultural peace throughout human history in his critical 1991 book “blood relations”
Relevant chapter: http://www.chrisknight.co.uk/wp-content/uploads/2007/09/Sex-...
Seems fairly obvious that’s what’s happening and mirrors historical birth rate crashes aligning with general breakup of long running social expectations
Polybius wrote as such in 200BC:
“ In our time all Greece was visited by a dearth of children and generally a decay of population, owing to which the cities were denuded of inhabitants, and a failure of productiveness resulted, though there were no long-continued wars or serious pestilences among us.”
Birth rates crashe when people generally feel like there is no future for the current type of society or future societies that their current societies are headed towards.
https://www.perseus.tufts.edu/hopper/text?doc=Perseus%3Atext...