Scientists Brindley and Rushton, in 1974, once successfully created a type
of visual prosthesis that allowed certain blind people to see Braille spots using phosphenes.
Rushton's argument has been condemned not only for
its unscientific basis but for promoting a“barely disguised hierarchy of humanness” in which“everything human and desirable is K and everything animalistic and evil is r”Weizmann, et al.,
Rushton's theory on the other hand
requires that a homogenous suite of personality traits ordered along a single dimension has been adaptive though all of human history, which would require a constant homogenous environment throughout this vast period.