Who first differentiated infantile autism from childhood disorders?

Leo Kanner differentiated infantile autism from childhood disorders. Kanner expressed a great deal of concern about the usual mistreatment of mentally disabled children. He expressed concern about a society that causes the intellectual haves to look down on the intellectual have-nots.

My teacher was in one when she was in high school. these abusive lovers can ruin you. mentally and physically. my teacher got a black eye once. she wasn’t able to attend parties or even her moms birthday party all because her bday wanted her to himself.