Read the most advanced science of autism causes here. Bypass the commenterati and go direct to the science. Don't waste your time at the sites which pretend "no-one" knows what causes (or what sometimes cures) autism.
This is a website relating to the unchallenged theory of autism, IQ and genius, Personality and Individual Differences 14:459-482 (1993) by Robin P Clarke (the antiinnatia theory). An update review paper is being prepared for publication. Meanwhile you can download the original 1993 publication (presentationally revised) here, and the original 1993 publication (author's reprint) here . (the journal site version is here: http://dx.doi.org/10.1016/0191-8869(93)90316-U, but without added charts of social class and you may have to pay Elsevier $31.)

Causes of autism - update of unchallenged theory

This is a website relating to the unchallenged theory of autism, IQ and genius (the antiinnatia theory). An update review paper is being prepared for publication. Meanwhile you can download the original 1993 publication here . Be sure to print it out rather than trying to read on screen.

I cannot put the update paper on a website before it has been accepted by a journal. But in the interim I can send you a copy by email if you email a request for it to rpclarke [at] autismcauses[dot]info .

Short bio of RP Clarke

I have no personal connections with any autism/Aspergers/ASD condition.
I have no commercial or financial links to the subject.
I and the antiinnatia theory couldn't give a hoot as to whether any autism is caused by vaccines, or by dental amalgam, or global warming, too much listening to Mahler symphonies, or even the engines of flying saucers not being correctly tuned to modern standards.

I am currently pursuing a High Court legal action against the Dept of "Health" for quack advice about dental amalgam, causing disability since age 17 (entirely unrelated to autism causation) - http://amalgamlegal.blogspot.com

Just about all the universities on the planet have policies prohibiting discrimination against disabled persons.  But they count for nothing whatsoever when the disabilities in question have been caused by the official quackery of the lying "distinguished" "expert" "healthcare" "professors" detailed here:  http://amalgamlegal.blogspot.co.uk/2011/10/links-to-foi-requests-revealing-nhsdh.html.