We already know the answer to this it’s that the definition of autism changed, first to include Asperger’s and then to be a whole spectrum. This isn’t environmental it’s about how do people define a disorder. There’s no like single cause and if you look at history people like Petain had verbal
delays he didn’t start talking until he was like three. Society used to run on ‘well that person is a little different, leave it alone’ now we want to categorize people and I dunno being outgoing is seen as the default. All of this is about how do we decide what a disability is, not soy or seed
oils or whatever these people want it to be.