Reply #37: That was the answer I was waiting for

[Jonathan50]

Sometimes questions work better than statements at illuminating certain subjects.

There is even some evidence that early modern humans and early domesticated dogs (who vastly increased human success in hunting) were both smarter than present day people and present day dogs, and both varieties had bigger brains. But all that success led to farming, less stimulation and decreasing intelligence because the big brains of hunter gatherers and early domestic dogs was no longer needed.

That is what I thought, an extreme envionment requires more intelligence for survival than a more benign one.

As Larry Niven once wrote, "How much intelligence does it take to sneak up on a tuber".

How then to explain the Flynn effect?