He says the racial differences in intelligence are *still the most incendiary topic in psychology*.  Of course this is intended as a statement related to the field of intelligence testing more than psychology broadly.  I would assume so anyway, considering there are many more incendiary topics.  However, there is one topic itself also in the field of intelligence testing that is far far far more incendiary than the racial differences in intelligence.  What is that?  The differences of intelligence between biological sexes (as determined by presence or absense of y chromosome on primary cell population).  I regretfully must use that absurdly clunky definition of sex due to the tendancies of certain malcontents that i may cut them off at the pass.