Climate, customs, and habits are the causes of these variations in the secondary functions, which at times become so similar as to permit of confusion in the most opposite races. Let a member of the white race be thrown into the midst of wild Indians, become a prisoner of the red-skins, and share their warlike existence in the midst of forests, we shall see that the sense of sight, as also that of hearing, will attain in this individual the same perfection which they enjoy in his new companions. It is by virtue of the prodigious flexibility of our organism, and of our powers of imitation and assimilation, that the physiological functions of secondary importance become capable of such modification.

The intellectual and moral characteristics are those which take the lead in man. Not only are we unable to pass them over in silence in the general study of the human race, but much more importance must be assigned to them than to mere corporeal characteristics. If the naturalist, when he studies an animal, makes a point, when he has described his structure and organism, of considering his habits and manner of life, how much more should he, when treating of man, dwell upon his intellectual faculties, the stamp which so truly identifies our species.

Man makes use of language as the means of expressing his intelligence. If man is provided with the power of speech, which he has in common with no other animal, it is owing to the fact that in him intelligence is infinitely more developed than in the animal. It is through the simultaneous concurrence of all his senses that the faculty of speech is manifested in man; and the proof of this is, that through the absence of one of his senses, he loses this faculty. What is meant by a person born dumb? It is an individual similar in all respects to speaking man, but differing from him in this, that he came into the world perfectly deaf. The primary absence of the power of hearing has paralysed the child’s intelligence with special reference to his imitative faculty, and in fact, the person called deaf and dumb is originally simply a person born deaf.

Language, then, is but the expression of the highest intelligence. “Animals have a voice,” says Aristotle, “but man alone speaks.” Nothing can be truer than this statement of the immortal Greek philosopher.

It is well known how the languages and dialects spoken in the world have multiplied; and, indeed, nothing is more difficult than to classify all the languages and dialects that exist. This difficulty becomes more insurmountable when we consider that languages vary in course of time to a very considerable extent. The French of Rabelais and Montaigne, who wrote at the time of the Renaissance, is not very intelligible to us, and that of French chroniclers at the time of St. Louis can only be understood by studying it specially and with a dictionary. Modern Italians read Dante with great difficulty, and the same may be said for the English as regards their great writer Shakespeare. Languages then alter very rapidly, even though the people themselves remain stationary. The alterations are much more serious and rapid when two peoples amalgamate.

These considerations are sufficient to convey an idea of the problem which scholars have propounded in wishing to ascertain the language of primitive humanity. It may be said that such a problem is incapable of solution. We must therefore despair of finding the mother tongue, and limit ourselves to those which are her offspring.

Upon a comparison of these last, it has been decided to assign to three fundamental groups all the languages which have been, and are still, spoken on the earth; these are, as we have already said, monosyllabic, agglutinative and inflected languages.

Chinese is the most decided example of a monosyllabic language. Each word comprises but one syllable, and has an absolute meaning in itself. Recourse must be had to the complicated combination of a quantity of utterances in order to impress all modifications of thought, all distinctions of time, place, person, condition, &c. One marvels to hear that the Chinese language comprehends such an immense number of words, that the life of a single man of letters is not sufficiently long to allow of his learning all. This apparent wealth is but the most utter poverty. This language, whose vocabulary is infinite, is simply detestable. To its imperfection must be attributed the smallness of the progress which the people of Asia have made in the direction of intelligence and commerce.

Agglutinative languages, which are spoken by Negroes, as also by many people of the yellow race, are the first degree of perfection in human speech. In these the word is no longer unique; variable terminations attached to each word modify the primitive expression. They contain roots and words whose function it is to modify these roots.

The third and last degree of perfection in human speech is found in inflected languages. Those languages are so called, in which the same word is capable of modification a great number of times, in order to express the different shades of thought, and to translate changes of time, person, or place. Inflected languages are made up of a series of different terms, the number of which is by no means large, but the modification of which, by means of adjuncts, or through the position they occupy, are indeed innumerable. All European languages, and those spoken in Asia by people of the white race, are inflected.