>>512829543
https://youtu.be/Kv-ZZYepjfY?t=254
Actually that happened after the barbarians conquered Western Rome and as a result people started to work less, they played dice while their women toiled the soil, they ate more eat and got taller but yes every sphere of life collapsed and that's due to the poor administration.
Anyway there are serious books on the topic of sexual proclivity but those patterns do not apply anymore solely because of birth control of which outcome we don't yet know, it's too early, it might stop some things and put under pressure something very nasty that we have not seen yet.