I'd suggest to Carmack that Ayn Rand would consider John Derbyshire's small-minded views "most crudely primitive".
Racism is the lowest, most crudely primitive form of collectivism. It is the notion of ascribing moral, social or political significance to a man's genetic lineage -- the notion that a man's intellectual and characterological traits are produced and transmitted by his internal body chemistry. Which means, in practice, that a man is to be judged, not by his own character and actions, but by the characters and actions of a collective of ancestors.
Racism claims that the content of a man's mind (not his cognitive apparatus, but its content) is inherited; that a man's convictions, values and character are determined before he is born, by physical forces beyond his control. This is the caveman's version of the doctrine of innate ideas -- or of inherited knowledge -- which has been thoroughly refuted by philosophy and science. Racism is a doctrine of, by and for brutes. It is a barnyard or stock-farm version of collectivism, appropriate to a mentality that differentiates between various breeds of anmials, but not between animals and men.