Honestly, diversity is what makes humans strong.

It would make sense if a few people in a tribe were night owls.

I think it makes sense that it would be better for a group of humans to have at least one that likes to stay up late and sleep in.

There are a lot of human problems that are created by our culture and society. And even technology.

For instance. Dyslexia doesn't exist except in written language that requires precision horizontal tracking.

It's much less of a problem for Chinese people. Their written language is vertical and reads right to left.

ADHD.

Do we think this was a problem in nomadic tribes?

Probably not. It certainly makes it hard for people to do repetitive tasks for 8 hours. But the human brain was never designed for that in the first place.

I took a course, many years ago on the ethical and cultural issues of the dsm.

My understanding was that most dsm disorders are heavily culturally created in one way or another. How we define a problem. What criteria is considered valid or not.

Some diagnoses are more universal than others.

The symptoms can vary based on culture and generation.

Some problems are a product of our society restricting people to a narrow set of acceptable behaviors. Often for capitalistic reasons. That are not healthy for us, mentally nor physically. (Working in a factory , sitting at a computer all day).