“A 2010 analysis of autism diagnoses in California did not find that autism clustered preferentially around areas rich in IT industry. Instead, it found that clusters tended to occur in areas where parents were older and educated to a higher level than were parents in surrounding areas.”
several studies have found a correlation between age of parents and autism:
given the fact that northwestern europeans have a long tradition of late marriage — i’m thinking of the hajnal line here — could that account, at least in part, for what appears to be such a large number of systemizers amongst european populations?
(note: comments do not require an email. you don’t have to be a systemizer either [although it would probably help (~_^) ].