And if this be true of the physical constitution of man, in how much higher degree is it true of his mental constitution? All our physical parts we bring with us into the world; but the mind develops afterward.
There is a stage in the growth of every organism in which it cannot be told, except by the environment, whether the animal that is to be will be fish or reptile, monkey or man. And so with the newborn infant; whether the mind that is yet to awake to consciousness and power is to be English or German, American or Chinese—the mind of a civilized man or the mind of a savage—depends entirely on the social environment in which it is placed.
Take a number of infants born of the most highly civilized parents and transport them to an uninhabited country. Suppose them in some miraculous way to be sustained until they come of age to take care of themselves, and what would you have? More helpless savages than any we know of. They would have fire to discover; the rudest tools and weapons to invent; language to construct. They would, in short, have to stumble their way to the simplest knowledge which the lowest races now possess, just as a child learns to walk. That they would in time do all these things I have not the slightest doubt, for all these possibilities are latent in the human mind just as the power of walking is latent in the human frame, but I do not believe they would do them any better or worse, any slower or quicker, than the children of barbarian parents placed in the same conditions. Given the very highest mental powers that exceptional individuals have ever displayed, and what could mankind be if one generation were separated from the next by an interval of time, as are the seventeen-year locusts? One such interval would reduce mankind, not to savagery, but to a condition compared with which savagery, as we know it, would seem civilization.
And, reversely, suppose a number of savage infants could, unknown to the mothers, for even this would be necessary to make the experiment a fair one, be substituted for as many children of civilization, can we suppose that growing up they would show any difference? I think no one who has mixed much with different peoples and classes will think so. The great lesson that is thus learned is that “human nature is human nature all the world over.” And this lesson, too, may be learned in the library. I speak not so much of the accounts of travelers, for the accounts given of savages by the civilized men who write books are very often just such accounts as savages would give of us did they make flying visits and then write books; but of those mementos of the life and thoughts of other times and other peoples, which, translated into our language of today, are like glimpses of our own lives and gleams of our own thought. The feeling they inspire is that of the essential similarity of men. “This,” says Emanuel Deutsch—“this is the end of all investigation into history or art. They were even as we are.”
There is a people to be found in all parts of the world who well illustrate what peculiarities are due to hereditary transmission and what to transmission by association. The Jews have maintained the purity of their blood more scrupulously and for a far longer time than any of the European races, yet I am inclined to think that the only characteristic that can be attributed to this is that of physiognomy, and this is in reality far less marked than is conventionally supposed, as anyone who will take the trouble may see on observation. Although they have constantly married among themselves, the Jews have everywhere been modified by their surroundings—the English, Russian, Polish, German, and Oriental Jews differing from each other in many respects as much as do the other people of those countries. Yet they have much in common, and have everywhere preserved their individuality. The reason is clear. It is the Hebrew religion—and certainly religion is not transmitted by generation, but by association—which has everywhere preserved the distinctiveness of the Hebrew race. This religion, which children derive, not as they derive their physical characteristics, but by precept and association, is not merely exclusive in its teachings, but has, by engendering suspicion and dislike, produced a powerful outside pressure which, even more than its precepts, has everywhere constituted of the Jews a community within a community. Thus has been built up and maintained a certain peculiar environment which gives a distinctive character. Jewish intermarriage has been the effect, not the cause of this. What persecution which stopped short of taking Jewish children from their parents and bringing them up outside of this peculiar environment could not accomplish, will be accomplished by the lessening intensity of religious belief, as is already evident in the United States, where the distinction between Jew and Gentile
