One thing we know about the Flynn effect is that it plateaued in most places decades ago, and has been reversing in many places for a while. The same Wikipedia

One thing we know about the Flynn effect is that it plateaued in most places decades ago, and has been reversing in many places for a while. The same Wikipedia article you linked discusses it in a few places, including here: https://en.wikipedia.org/wiki/Flynn_effect#Possible_end_of_progression https://en.wikipedia.org/wiki/Flynn_effect#Possible_end_of_p...