This variety is visible to us chiefly on our globe; in the infinite multiplicity of its animal forms, in the wonderful insect tribes, and in the brilliant shells floating in the ocean; visible also in the incredible number of trees, shrubs, herbs, down to the most minute vegetable organisms, spread with such reckless abundance on the surface of our dwelling; visible, finally, in the infinity of different shapes assumed by inorganic matter. But what is yet more wonderful and seemingly unaccountable is that, taking every species of being in particular, and looking at any two individuals of the same species, we would consider it an astonishing effect of chance, were we to meet with two objects of our study perfectly alike. The mineralogist notices it, if he finds in the same group of crystals two altogether similar; the botanist would express his astonishment if, on comparing two specimens of the same plant, he found no difference between them. The same may be said of birds, of reptiles, of mammalia, of the same kind. A close observer will even easily detect dissimilarities between the double organs of the same person, between the two eyes of his neighbor, the two hands of a friend, the two feet of a stranger whom he meets. It is therefore but consistent with general analogy that in the moral as well as in the physical faculties of man, the same ever-recurring variety should appear, in the features of the face, in the shape of the limbs, in the moving of the muscles, as well as in the activity of thought, in the mobility of humor, in the combination of passions, propensities, sympathies, and aversions. But, at the same time, with all these peculiarities perceptible in individuals, men, when studied attentively, show themselves in groups, as it were, distinguished from other groups by peculiarities of their own, which are generally called characteristics of race; and although, according to various systems, these characteristics are made to expand or contract at will, to serve an _a priori_ purpose, and sustain a preconcerted theory, yet there are, with respect to them, startling facts which no one can gainsay, and which are worthy of serious attention. Two of these facts may be stated in the following propositions: I. At the cradle of a race or nation there must have been a type imprinted on its progenitor, and passing from him to all his posterity, which distinguishes it from all others. II. The character of a race once established, cannot be eradicated without an almost total disappearance of the people.