Yes, it’s also interesting to look at the reasons why it wasn’t widespread for much of the time in question.
My guess is that memetic evolution suppresses birth control faster than genetic evolution can adept to it. Periodically we get outbreaks, like present-day non-religious WEIRD culture, where the suppressing memes collapse due to events in the larger memetic ecosystem.
Yes, it’s also interesting to look at the reasons why it wasn’t widespread for much of the time in question.
My guess is that memetic evolution suppresses birth control faster than genetic evolution can adept to it. Periodically we get outbreaks, like present-day non-religious WEIRD culture, where the suppressing memes collapse due to events in the larger memetic ecosystem.