Here's a film a couple of years back about a middle-aged guy on the spectrum
Chris Murray works a couple of jobs, lives in his own apartment, is a very unique artist.
His family comes from money. His Dad sounds like a big rage-aholic. If anything, Chris is one of the more well-adjusted people in the family!
With this domineering and abusive a father, if there's a case for a psychological cause for autism, it's probably this. But still, it's almost certain that the vast majority of cases of autism have a biological cause. And/or often just a human variant. As Temple Grandin has argued, we need technical persons. In the hunter-gatherer days, we needed people interested in making better bows and arrows and better fish nets, and not just highly sociable people yakking around the campfire. Maybe in most of severe cases, things have gone too far in the autistic direction to be fully functional?
-----------
http://inheavenmovie.com/
Movie was made by Chris's older brother Tom. several years ago
It got it's title, the family had money and were acquainted with Dick Nixon. At one point, Chris mentions meeting Nixon. And Nixon said, Good, Chris, Good. (and so, in his at times awkward way, Richard Nixon was trying to be encouraging)