...
The more plausible explanation involves the gender disparity of outliers. Males are the extreme species of the gender, that is, nature experiments with genetic outliers far more with males of the species than females because males are more expendable in the reproductive process. This is seen across most species.
...
A very interesting point to consider!
Though I believe we're also glossing over what needs to be considered in addition, with such discussions: childhood, and how players are raised.
The Polgars were noteworthy because of how chess-obsessed their childhood was. How novel and unique an idea it seemed, for female youths to be raised on chess!
Yet this is relatively common practice among aspiring boy players.
I believe if we really want to try to close the gender gap in chess, we need to start raising girl players the same way we raise our boys ... but then we'll be opening a whole new discussion, in terms of socio-cultural expectations and norms ...
100%, you don't really see parents sending female kids to, like, chess schools or the like. There's just not as much of a culture around having women become elite chess players, either because of stereotypes, discrimination, or belief that women are naturally worse at chess.
while there are many problems with IQ, I think you would need rather strong evidence to claim it is "completely false"
you are right, i is simply not used in the way it was intended, it was supposed to be used for the SOLE purpose of identifying kids who needed extra help in school.