I have an eighteen-month old child and have been reading a lot about child rearing since my wife got pregnant.
It’s taboo to say this, and I’m sorry if this offends anyone, but I suspect that a lack of adult attention in the first three years of life is a principal factor in the rising autism rates we’re seeing in modern economies. This would explain why autism seems to “cluster” in upper class homes, where the parents work nonstop.
It turns out this hypothesis was put forth by Kanner in the 50’s and is as old as autism itself, but it was rejected for political reasons and it is not refuted by the science.
I first heard this hypothesis from the lectures of Gabor Maté, and it makes a lot of sense to me. If you look at what autism treatment actually is, it’s all just play therapy where you give a child attention and teach them that if they bid for an adult’s attention they will respond empathetically. This treatment only makes sense if they didn’t already learn to do this as an infant.