What the Melting Pot actually does in practice can be seen in Mexico, where the absorption of the blood of the original Spanish conquerors by the native Indian population has produced the racial mixture which we call Mexican and which is now engaged in demonstrating its incapacity for self-government. The world has seen many such mixtures and the character of a mongrel race is only just beginning to be understood at its true value.
It must be borne in mind that the specializations which characterize the higher races are of relatively recent development, are highly unstable and when mixed with generalized or primitive characters tend to disappear. Whether we like to admit it or not, the result of the mixture of two races, in the long run, gives us a race reverting to the more ancient, generalized and lower type. The cross between a white man and an Indian is an Indian; the cross between a white man and a Negro is a Negro; the cross between a white man and a Hindu is a Hindu; and the cross between any of the three European races and a Jew is a Jew.
In the crossing of the blond and brunet elements of a population, the more deeply rooted and ancient dark traits are prepotent or dominant. This is matter of everyday observation and the working of this law of nature is not influenced or affected by democratic institutions or by religious beliefs. Nature cares not for the individual nor how he may be modified by environment. She is concerned only with the perpetuation of the species or type and heredity alone is the medium through which she acts.
As measured in terms of centuries these characters are fixed and rigid and the only benefit to be derived from a changed environment and better food conditions is the opportunity afforded a race which has lived under adverse conditions to achieve its maximum development but the limits of that development are fixed for it by heredity and not by environment.
In dealing with European populations the best method of determining race has been found to lie in a comparison of proportions of the skull, the so-called cephalic index. This is the ratio of maximum width, taken at the widest part of the skull above the ears, to maximum length. Skulls with an index of 75 or less, that is, those with a width that is three-fourths of the length or less, are considered dolichocephalic or long skulls. Skulls of an index of 80 or over are round or brachycephalic skulls. Intermediate indices, between 75 and 80, are considered mesaticephalic. These are cranial indices. To allow for the flesh on living specimens about two per cent is to be added to this index and the result is the cephalic index. In the following pages only long and round skulls are considered and the intermediate forms are assigned to the dolichocephalic group.
This cephalic index, though an extremely important if not the controlling character, is, nevertheless, but a single character and must be checked up with other somatological traits. Normally, a long skull is associated with a long face and a round skull with a round face.
The use of this test, the cephalic index, enables us to divide the great bulk of the European populations into three distinct subspecies of man, one northern and one southern, both dolichocephalic or characterized by a long skull and a central subspecies which is brachycephalic or characterized by a round skull.
The first is the Nordic or Baltic subspecies. This race is long skulled, very tall, fair skinned with blond or brown hair and light colored eyes. The Nordics inhabit the countries around the North and Baltic Seas and include not only the great Scandinavian and Teutonic groups, but also other early peoples who first appear in southern Europe and in Asia as representatives of Aryan language and culture.
The second is the dark Mediterranean or Iberian subspecies, occupying the shores of the inland sea and extending along the Atlantic coast until it reaches the Nordic species. It also spreads far east into southern Asia. It is long skulled like the Nordic race but the absolute size of the skull is less. The eyes and hair are very dark or black and the skin more or less swarthy. The stature is distinctly less than that of the Nordic race and the musculature and bony framework weak.
The third is the Alpine subspecies occupying all central and eastern Europe and extending through Asia Minor to the Hindu Kush and the Pamirs. The Armenoids constitute an Alpine subdivision and may possibly represent the ancestral type of this race which remained in the mountains and high plateaux of Anatolia and western Asia.