Comment by ordu

I wouldn't give the Flynn effect a lot of weight. The numbers are from IQ tests. No one knows what they measure, they are tuned for a population, for the most of time the Flynn effect had place IQ test scores were used for hiring, school placement, and policy decisions (so Goodheart's Law was at play, how'd you think?).

It is a curious effect, I agree, I'd like to know why it was so, but probably I will not know for sure (I'm a big fan of a scientific method, but I don't believe it is up to a task), and so I personally prefer just ignore it.