The respectable family that supports worthless relatives or covers up their crimes in order to "protect the family name" (as if the moral stature of one man could be damaged by the actions of another) -- the bum who boasts that his great-grandfather was an empire-builder, or the small-town spinster who boasts that her maternal great-uncle was a state senator and her third-cousin gave a concert at Carnegie Hall (as if the achievements of one man could rub off on the mediocrity of another) -- the parents who search genealogical trees in order to evaluate their prospective sons-in-law -- the celebrity who starts his autobiography with a detailed account of his family history -- all these are samples of racism, the atavvistic manifestations of a doctrine whose full expression is the tribal warfare of prehistorical savages, the wholesale slaughter of Nazi Germany, the atrocities of today's so-called "newly-emerging nations."
The theory that holds "good blood" and "bad blood" as a moral-intellectual criterion, can lead to nothing but torrents of blood in practice. Brute force is the only avenue of action open to men who regard themselves as mindless aggregates of chemicals.
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Just as there is no such thing as a collective or racial mind, so there is no such thing as a collective or racial achievement. There are only individual minds and individual achievements -- and a culture is not the anonymous product of undifferentiated masses, but the sum of the intellectual achievements of individual men.