Well, it's well known that ADD/ADHD aren't about lack of focus, but about an inability to direct one's focus to where it's needed.

Normal people can think "I need X, let's work on X" but ADHD people are at the mercy of what's "chosen for them" by their brain.

This was probably fine 4000 years ago, when the world was looser, and people could find their place in life regardless of their particular quirks, but not so much nowadays.

This difficulty or inability to direct focus can be "trained away" with enough effort, but it isn't easy at all.

I think it's the opposite. 4000 years ago we would fail to prepare and not survive the winter.

Nowadays we get by by occasionally solving a problem that nobody asked to have solved but golly the solution is kinda neat.

> This was probably fine 4000 years ago, when the world was looser, and people could find their place in life regardless of their particular quirks, but not so much nowadays.

Is this likely? My overgeneralizing gut feel would be that more people who would have traits which might be perceived as unusual and impede survivability 4000 years ago would be more likely to receive a chance to live a regular lifespan in most today‘s societies.