They always did, its just that you now know about it.
What do you mean I didn't know about it?
I always knew much of my family, including me, had autism.
No they weren't. Autism is as a result of endocrine disruptions through environmental contamination along with a significant amount of heredity transmission. Same reason why T rates, sperm rates, fertility, are cratering.
https://en.wikipedia.org/wiki/Empathising%E2%80%93systemisin...
Unironically trying to villify the "Atrazine is turning the frogs gay" guy is going to look really stupid to liberals very soon.
I know this is the conventional view. But is it possible that the prevalence of autism has been somewhat exaggerated and overdiagnosed? There's a CLEAR profit motive here...