I also hear there is a lot of undiagnosed ADHD linked to substance use...worth a google I'd say. RooI have also heard tt causes can even be generational energetically (so that may link to trauma as well as food/drink habits and biology...)
I've read plenty of the Alice Miller books years ago, but basically there was a huge effort to 'beat the devil out of a child' book that was used for a hundred years in the Middle Ages or thereabouts...That set up unrealistic and unhealthy standards for children, many of whom progressed to working and going into factories.