The Biome and the Fertility Crisis

There is definitely some some physical features that can keep these two cultures separate okay another question to help me understand how this is working. How long ago did this um biological disaster happen I think the thing that happened it's no longer living memory maybe not a thousand years but maybe like two three hundred years so all the all the ritual and sociological effects of it have stayed filtered down through just the sense of like this is what we do but not necessarily the wise of  and this is why we need to keep doing it because we do nobody specifically remembers the great fertility crisis when there is no babies they just know this is this is how we do it right? Yes you said that it was related