[markessien]

No, it's not. we know the genes the Neanderthal transferred, and nothing with head size is in there. Also, Africans have autism too.

[Der_Einzige]

Are you sure that rates of autism are evenly distributed?

[delecti]

They don't need to be evenly distributed to be strong evidence against the Neanderthal connection. If autism was basically "latent Neanderthal ancestry", then you'd expect essentially no autism outside of people with European or Middle Eastern ancestry.

And it seems that the prevalence of autism is actually fairly even, but might actually be lower among white people.

https://www.cdc.gov/ncbddd/autism/addm-community-report/spot...