“Now the trickiest catch in the negro problem is the fact that it is really twofold. The black is vastly inferior. There can be no question of this among contemporary and unsentimental biologists—eminent Europeans for whom the prejudice-problem does not exist. But, it is also a fact that there would be a very grave and very legitimate problem even if the negro were the white man's equal. For the simple fact is, that two widely dissimilar races, whether equal or not, cannot peaceably coexist in the same territory until they are either uniformly mongrelised or cast in folkways of permanent and traditional personal aloofness. No normal being feels at ease amidst a population having vast elements radically different from himself in physical aspect and emotional responses. A normal Yankee feels like a fish out of water in a crowd of cultivated Japanese, even though they may be his mental and aesthetic superiors; and the normal Jap feels the same way in a crowd of Yankees. This, of course, implies permanent association. We can all visit exotic scenes and like it—and when we are young and unsophisticated we usually think we might continue to like it as a regular thing. But as years pass, the need of old things and usual influences—home faces and home voices—grows stronger and stronger; and we come to see that mongrelism won't work. We require the environing influence of a set of ways and physical types like our own, and will sacrifice anything to get them. Nothing means anything, in the end, except with reference to that continuous immediate fabric of appearances and experiences of which one was originally part; and if we find ourselves ingulphed by alien and clashing influences, we instinctively fight against them in pursuit of the dominant freeman's average quota of legitimate contentment.... All that any living man normally wants—and all that any man worth calling such will stand for—is as stable and pure a perpetuation as possible of the set of forms and appearances to which his value-perceptions are, from the circumstances of moulding, instinctively attuned. That is all there is to life—the preservation of a framework which will render the experience of the individual apparently relevant and significant, and therefore reasonably satisfying. Here we have the normal phenomenon of race-prejudice in a nutshell—the legitimate fight of every virile personality to live in a world where life shall seem to mean something.... Just how the black and his tan penumbra can ultimately be adjusted to the American fabric, yet remains to be seen. It is possible that the economic dictatorship of the future can work out a diplomatic plan of separate allocation whereby the blacks may follow a self-contained life of their own, avoiding the keenest hardships of inferiority through a reduced number of points of contact with the whites... No one wishes them any intrinsic harm, and all would rejoice if a way were found to ameliorate such difficulties as they have without imperilling the structure of the dominant fabric. It is a fact, however, that sentimentalists exaggerate the woes of the average negro. Millions of them would be perfectly content with servile status if good physical treatment and amusement could be assured them, and they may yet form a well-managed agricultural peasantry. The real problem is the quadroon and octoroon—and still lighter shades. Theirs is a sorry tragedy, but they will have to find a special place. What we can do is to discourage the increase of their numbers by placing the highest possible penalties on miscegenation, and arousing as much public sentiment as possible against lax customs and attitudes—especially in the inland South—at present favouring the melancholy and disgusting phenomenon. All told, I think the modern American is pretty well on his guard, at last, against racial and cultural mongrelism. There will be much deterioration, but the Nordic has a fighting chance of coming out on top in the end.”

Letter to James F. Morton (January 1931), in Selected Letters III, 1929-1931 edited by August Derleth and Donald Wandrei, p. 253
Non-Fiction, Letters, to James Ferdinand Morton, Jr.