has no name in the language, no place in the hearts, of other races. This I consider as the principal reason of the superiority of our branch of the human family over all others; because even in the lowest, the most debased of our race, we generally find some spark of this redeeming trait, and however misapplied it may often be, and certainly is, it prevents us, even in our deepest errors, from falling so fearfully low as the others. The extent of moral abasement in which we find so many of the yellow and black races is absolutely impossible even to the very refuse of our society. The latter may equal, nay, surpass them in crime; but even they would shudder at that hideous abyss of corrosive vices, which opens before the friend of humanity on a closer study of these races.[196] Before concluding this picture, I would add that the immense superiority of the white races in all that regards the intellectual faculties, is joined to an inferiority as strikingly marked, in the intensity of sensations. Though his whole structure is more vigorous, the white man is less gifted in regard to the perfection of the senses than either the black or the yellow, and therefore less solicited and less absorbed by animal gratifications. * * * * * I have now arrived at the historical portion of my subject. There I shall place the truths enounced in this volume in a clearer light, and furnish irrefragable proofs of the fact, which forms the basis of my theory, that nations degenerate only in consequence and in proportion to their admixture with an inferior race--that a society receives its death-blow when, from the number of diverse ethnical elements which it comprises, a number of diverse modes of thinking and interests contend for predominance; when these modes of thinking, and these interests have arisen in such multiplicity that every effort to harmonize them, to make them subservient to some great purpose, is in vain; when, therefore, the only natural ties that can bind large masses of men, homogeneity of thoughts and feelings, are severed, the only solid foundation of a social structure sapped and rotten. To furnish the necessary details for this assertion, to remove the possibility of even the slightest doubt, I shall take up separately, every great and independent civilization that the world has seen flourish. I shall trace its first beginnings, its subsequent stages of development, its decadence and final decay. Here, then, is the proper test of my theory; here we can see the laws that govern ethnical relations in full force on a magnificent scale; we can verify their inexorably uniform and rigorous application. The subject is immense, the panorama spread before us the grandest and most imposing that the philosopher can contemplate, for its tableaux comprise the scene of action of every instance where man has really worked out his mission "to have dominion over the earth."