"We never saw any of this ADHD or autism stuff when I was young!"

You never saw any photos of the surface of Mars back then either, but I'm pretty sure it was still there the whole time

@Garwboy ADD & Autism were added to the DSM (III) in 1980 & neither were commonly diagnosed until the late 80s. So they're right...
@scottgal @Garwboy improvements in diagnosis capability don't change the prevalence though.
@mawhrin @Garwboy They do if the diagnosis didn't exist before. Autism for example was diagnosed as 'childhood psychosis / shizoid disorder' and the children often locked away for life https://blogs.uoregon.edu/autismhistoryproject/topics/childhood-psychosis-or-schizophrenia/#:~:text=Before%20autism%20existed%20as%20a,in%20life%20was%20notoriously%20difficult.
Childhood Psychosis or Schizophrenia – The Autism History Project