The author has endeavored to make the references and quotations in this Supplement very full and, so far as possible, interesting in themselves as well as entirely distinct from the text, which stands substantially unchanged, and the authorities quoted are not necessarily the sources of the views herein expressed but more often are given in support of them. The contents of the book, since its first appearance, have had the advantage of the criticism of virtually every anthropologist in America and in England, France and Italy—many of whom have furnished the author with valuable corroborative material. Some of this material appears in the notes, but accessible authorities and the classical writers have been given the more prominent place. The supplement covered, as first prepared, substantially every statement in the book, but much was afterward omitted because it would seem that some things could be taken without proof.

“The Passing of the Great Race,” in its original form, was designed by the author to rouse his fellow-Americans to the overwhelming importance of race and to the folly of the “Melting Pot” theory, even at the expense of bitter controversy. This purpose has been accomplished thoroughly, and one of the most far-reaching effects of the doctrines enunciated in this volume and in the discussions that followed its publication was the decision of the Congress of the United States to adopt discriminatory and restrictive measures against the immigration of undesirable races and peoples.

Another of the results has been the publication in America and Europe of a series of books and articles more or less anthropological in character which have sustained or controverted its main theme. The new definition of race and the controlling rôle played by race in all the manifestations of what we call civilization are now generally accepted even by those whose political position depends upon popular favor.

It was to be expected that there would be bitter opposition to those definitions of race which are based on physical and psychical characters that are immutable, rather than upon those derived from language or political allegiance, that are easily altered.

To admit the unchangeable differentiation of race in its modern scientific meaning is to admit inevitably the existence of superiority in one race and of inferiority in another. Such an admission we can hardly expect from those of inferior races. These inferior races and classes are prompt to recognize in such an admission the very real danger to themselves of being relegated again to their former obscurity and subordinate position in society. The favorite defense of these inferior classes is an unqualified denial of the existence of fixed inherited qualities, either physical or spiritual, which cannot be obliterated or greatly modified by a change of environment. Failing in this, as they must necessarily fail, they point out the presence of mixed or intermediate types, and claim that in these mixtures, or blends as they choose to call them, the higher type tends to predominate. In fact, of course, the exact opposite is the case and it is scarcely necessary to cite the universal distrust, often contempt, that the half-breed between two sharply contrasted races inspires the world over. Belonging physically and spiritually to the lower race, but aspiring to recognition as one of the higher race, the unfortunate mongrel, in addition to a disharmonic physique, often inherits from one parent an unstable brain which is stimulated and at times overexcited by flashes of brilliancy from the other. The result is a total lack of continuity of purpose, an intermittent intellect goaded into spasmodic outbursts of energy. Physical and psychical disharmonies are common among crosses between Indians, negroes and whites, but where the parents are more closely related racially we often obtain individuals occupying the border-land between genius and insanity.

The essential character of all these racial mixtures is a lack of harmony—both physical and mental—in the first few generations. Then, if the strain survives, it is by the slow reversion to one of the parent types—almost inevitably the lower.

The temporary advantage of mere numbers enjoyed by the inferior classes in modern democracies can only be made permanent by the destruction of superior types—by massacre, as in Russia, or by taxation, as in England. In the latter country the financial burdens of the war and the selfish interests of labor have imposed such a load of taxation upon the upper and middle classes that marriage and children are becoming increasingly burdensome.

The best example of complete elimination of a dominant class is in Santo Domingo. The horrors of the black revolt were followed by the slow death of the culture of the white man. This history should be studied carefully because it gives in prophetic form the sequence of events that we may expect to find in Mexico and in parts of South America where the replacement of the higher type by the resurgent native is taking place.

In the countries inhabited by a population more or less racially uniform the phenomenon of the multiplication of the inferior classes fostered and aided by the noble but fatuous philanthropy of the well-to-do everywhere appears. Nature’s laws when unchecked maintain a relatively fixed ratio between the classes, which is greatly impaired in modern society by humanitarian and charitable activities. The resurgence of inferior races and classes throughout not merely Europe but the world, is evident in every despatch from Egypt, Ireland, Poland, Rumania, India and Mexico. It is called nationalism, patriotism, freedom and other high-sounding names, but it is everywhere the phenomenon of the long-suppressed, conquered servile classes rising against the master race. The late Peloponnesian War in the world at large, like the Civil War in America, has shattered the prestige of the white race and it will take several generations and perhaps wars to recover its former control, if it ever does regain it. The danger is from within and not from without. Neither the black, nor the brown, nor the yellow, nor the red will conquer the white in battle. But if the valuable elements in the Nordic race mix with inferior strains or die out through race suicide, then the citadel of civilization will fall for mere lack of defenders.

One of the curious effects of democracy is the unquestionable fact that there is less freedom of the press than under autocratic forms of government. It is well-nigh impossible to publish in the American newspapers any reflection upon certain religions or races which are hysterically sensitive even when mentioned by name. The underlying idea seems to be that if publication can be suppressed the facts themselves will ultimately disappear. Abroad, conditions are fully as bad, and we have the authority of one of the most eminent anthropologists in France that the collection of anthropological measurements and data among French recruits at the outbreak of the Great War was prevented by Jewish influence, which aimed to suppress any suggestion of racial differentiation in France. In the United States also, during the war, we were unable to obtain complete measurements and data, in spite of the self-devotion of certain scientists, like Drs. Davenport, Sullivan and others. This failure was due to lack of time and equipment and not to racial influences, but in the near future we may confidently expect in this country strenuous opposition to any public discussion of race as such.