> If wealth ultimately is the driver for such a disparity My understanding of "IQ" (although there seem to be multiple definitions) is that is it supposed to b

> If wealth ultimately is the driver for such a disparity My understanding of "IQ" (although there seem to be multiple definitions) is that is it supposed to be the purely physical (mental?) trait i.e. unaffected by environmental factors. Although I suppose whether that is the case is an open question (for me at least, unless anyone familiar with the topic can comment?).