Sometimes I try too hard to give you one-stop shopping on an idea...
Autism Is Bad by Sebastian Jensen, recommended by Aporia. I dislike the title, but it is clearly in reference to mythbusting the idea that autism is an intellectual advantage that makes geniuses.
Both of these mythical views of autism are wrong: autistic people are not more likely to be right wing and the link between genius and autism is overblown.
I had not heard of "dimensionality" but the concept is discussed in a internal link and took only a little pondering to pick up. I will not fully define it here in order to encourage you to go on the essay "Autism as a Disorder of Dimensionality," but it has to do with neuronal branching and complexity of brain architecture. And Johnson thinks the intelligence link is quite possible.
Neuronal density is a plausible candidate for the strongest factor underlying both genius and madness: it both drastically reduces canalization (normalcy), allowing the brain to be wired in strange ways and pointed in odd directions, and offers many more parameters — the raw stuff of achievement. This can lead to madness, genius, or both.
Also included is a chart of where various diagnoses are associated along the political spectrum. Spoiler alert: Most cluster around the center on both the social and economic axes. Both essays go into controversial territory, particularly the one at Opentheory.net. Some of it rather took my breath away. "Are you sure you want to go there?" Sometimes I get the feeling that they just don't like autists, and are trying to get back at someone. OTOH, sometimes they seem to defend them too much. All of this in a package of neurological research and solid grounding.
This links in turn to 'Just Emil Kirkegaard Things ' A theory of Ashkenazi genius: intelligence and mental illness.
Perhaps I should have started with something more reliable: Autism And Intelligence: Much More Than You Wanted To Know by Scott Alexander at ACX (then Star Slate Codex). I am surprised I have not linked this before. At least, I can't find it at present. Plenty of theories there as well.
These numbers should be taken with very many grains of salt. First, IQ tests don’t do a great job of measuring autistic people. Their intelligence tends to be more imbalanced than neurotypicals’, so IQ tests (which rely on an assumption that most forms of intelligence are correlated) are less applicable. Second, even if the test itself is good, autistic people may be bad at test-taking for other reasons – for example, they don’t understand the directions, or they’re anxious about the social interaction required to answer an examiner’s quetsions. Third, and most important, there is a strong selection bias in the samples of autistic people. Many definitions of autism center around forms of poor functioning which are correlated with low intelligence. Even if the definition is good, people who function poorly are more likely to seek out (or be coerced into) psychiatric treatment, and so are more likely to be identified.