Of the complete biological inferiority of the negro there can be no question—he has anatomical features consistently varying from those of other stocks, & always in the direction of the lower primates . . . Equally inferior—& perhaps even more so—is the Australian black stock, which differs widely from the real negro . . . In dealing with these two black races, there is only one sound attitude for any other race (be it white, Indian, Malay, Polynesian, or Mongolian) to take—& that is to prevent admixture as completely & determinedly as it can be prevented, through the establishment of a colour-line & the rigid forcing of all mixed offspring below that line. I am in accord with the most vehement & vociferous Alabaman or Mississippian on that point … racial questions are wholly different in nature—involving wide variations unconnected with superiority or inferiority. Only an ignorant dolt would attempt to call a Chinese gentleman—heir to one of the greatest artistic & philosophic traditions in the world—an "inferior" of any sort . . . & yet there are potent reasons, based on wide physical, mental, & cultural differences, why great numbers of the Chinese ought not to mix into the Caucasian fabric, or vice versa. It is not that one race is any than any other, but that their whole respective heritages are so antipodal as to make harmonious adjustment impossible. Members of one race can fit into another only through the of their own background-influences—& even then the adjustment will always remain uneasy & imperfect if the newcomer's physical aspect froms a constant reminder of his outside origin. Therefore it is wise to discourage all mixtures of sharply differentiated races—though the color-line does not need to be drawn as strictly as in the case of the negro, since we know that a dash or two of Mongolian or Indian or Hindoo or some such blood will not actually injure a white stock biologically. . . . As a matter of fact, most of the psychological race-differences which strike us so prominently are rather than . If one could take a Japanese infant, alter his features to the Anglo-Saxon type through plastic surgery, & place him with an American family in Boston for rearing—without telling him that he is not an American—the chances are that in 20 years the result would be a typical American youth with very few instincts to distinguish him from his pure Nordic college-mates. The same is true of other superior alien races including the Jew—although the Nazis persist in acting on a false biological conception. If they were wise in their campaign to get rid of Jewish cultural influences (& a great deal can be said for such a campaign, when the dominance of the Aryan tradition is threatened as in Germany & New York City), they would not emphasize the separatism of the Jew but would strive to make him give up his separate culture & lose himself in the German people. It wouldn't hurt Germany—or alter its essential physical type—to take in all the Jews it now has. (However, that wouldn't work in Poland or New York City, where the Jews are of an inferior strain, & so numerous that they would essentially modify the physical type.)
H. P. Lovecraft