This is precisely what I don't understand. When I was a child, 50 years ago, children simply did not punch, hit or spit at adults. They just didn't. I've no doubt some stuggled with ADD, ADHD - attention span/being overly boisterous.
However, the point is, their behaviour was neither uncontrolled nor accepted as being 'just who they are' at the expense of others whether that's the physical assaults or the disruption to the education of others.
Also, I was only ever aware of one child with Autism and it presented in an obvious/classical way. He was very protected by his family and he did not attend mainstream school. No-one was cruel or abusive towards him, nor he to them. He had a particular 'fondness' for me and one of my brothers. I always felt privileged to receive his fondness and the big, beaming smile he always had for me.
Now, though, it seems to me a very high proportion of children are being put forward for a diagnosis.
I fully understand why teachers are leaving in droves preferring to not be punched and spat at or, indeed, being required to change nappies whilst attempting to educate. I also hear my nieces and nephews at the end of their respective tethers due to their children's education being constantly interrupted because 'wee Johnny' had three meltdowns today ..... not to mention the trauma to their children witnessing these meltdowns.
Again, I don't recall anyone in nappies at school and if anyone did have an accident, off they went to the school nurse to be assisted. Perhaps every school should have an on-site nurse/carer to deal with toilet needs as a priority, leaving teachers to teach?
I think the answer to the massive increase in diagnoses (either clinical or self) will only be discovered by examining both physiological, familial and societal inputs. I don't believe it is solely one or the other that has caused the incredible increase.