Autism is obviously different from childhood psychosis. 1938, the first child with autism was named Donald. He was discovered by many psychiatrists and submitted to Leo Kanner, a great child psychiatrist at that time, for research. Connor spent several years comparing and checking almost all cases of children's mental illness in the United States with historical documents of other countries. He found that there was no such person as Donald. Connor published an article in 1943, announcing that autism is a new disease. He found autism very unique. If it had existed before, someone would have found this strange form of expression and recorded it in the literature. This shows that there was no such thing before. Those who say that "autism existed before, but the ancients didn't find it" are simply mocking a group of top psychiatrists in the United States as idiots, and at the same time mocking top psychiatrists in Europe and Japan for being retarded and not finding it. As for whether the person who said this is a fool or a top psychiatrist in the United States, Europe and Japan is a fool, everyone can judge for themselves.

And if it is certain that autism is a new disease discovered by Connor, then this conclusion is more and more correct. This problem should be analyzed in combination with historical background, rather than judging that it has existed since ancient times.

Autism develops rapidly and does not conform to the laws of heredity or infectious diseases.

Therefore, I think the change of society and family is the reason for the increase of autism (in fact, this view was put forward by Professor Wang Zhichao of South China Normal University).