www.sciencedirect.com/science/arti...
www.sciencedirect.com/science/arti...
I wonder if we can go before texts, to think about traces in material culture etc.
what is for sure is the genetic architecture for ASD or SZ were more or less the same 10,000 yrs ago and maybe 50,000 yrs ago, and theses mutations are quite frequent.
You can read about shamanism. Jeremy Narby wrote a bit about that.