>>25536060I've never exactly described what pre-republic history of the area would be, I've mainly referred to the foundation of the capital, then the siege wars against schizos, and that's how the Republic forms, so the groups that reside in the area would either be schizo zones or undescribed groups that moved or got wiped by the wars.
For pre-history, we can't actually integrate /meat/ into any of it due to 2 very important factors
1. /meat/ as a general is younger than /who/, putting aside logistical factors, pre-/meat/ generals were either short to non-existent lifespans (like /sbg/ which as a fun fact was dedicate to ryona and not cannibalism)
2. We don't actually have that much crossover with /meat/, our resident cannibals formed up before /meat/ existed, and nowadays it takes place more as jokes about eating Bae and the brrats, and threats about eating brains (I'm somewhat sure that disembowel-anon is still around despite everything, no idea about berries-anon)
Basically, I believe that we don't have a good reason to try and integrate /meat/ or pre-/meat/ generals into our pre-/who/ history and we also don't have the need to do it. It's not like the gene mutation has to have a further explanation beyond "magic".
For the other question, from what I remember reading, chuubanite was created in the world the moment the crossover from /jp/ to /vt/ happened, I do not think /jp/ has chuubanite althought that may just be my memory being faulty.
Maybe one day I'll be able to write out a full document regarding pre-Republic history, when I do so, I'll try to map out what were the groups that lived in the region and if that does not work out for me, I'll have it be a zone with much schizo activity that drove out other settlers, something like that.