"These facts are decisive, and admit of no doubt. "For three centuries the whites, _par excellence_, the Europeans, have achieved, so to say, the conquest of the world. They have gone everywhere. Everywhere they have found local races who have borne them no resemblance. Whenever they have crossed with them, these unions have been fruitful; more so than with those indigenous to themselves. "Man, from the result of the institution of slavery--which happily has never stained the soil of France--has transported the negro everywhere; everywhere he has crossed with his slaves, and everywhere they have formed a population of mulattoes. Wherever the negro has crossed with local groups or families, there has arisen an intermediate race, who in character manifest their two-fold origin. The whites have finally crossed with the mongrels of all origins, and the result is, that in certain quarters of the globe--particularly in South America--there is an inextricable mixture of people, comparable, under the class, to the dogs in our streets and the cats of our alleys. "The rapidity with which these mongrel races cross and multiply is really remarkable. It is scarcely three centuries--hardly twelve generations--since Europeans penetrated into different parts of the world. {75} It is estimated that already the number of mongrels resulting from the crossing of whites with natives, is a seventieth of the whole population of the globe. Experience is indisputable, if we even deny modern science, or at least, wish to make man an exception to all living and organized beings. We must admit that all men form but one species, composed of a certain number of different races; consequently, all men can only be considered as having descended from one primitive pair. "We arrive at this conclusion in despite of all kinds of dogmatical, theological, philosophical, and metaphysical considerations. Observation and experience alone, applied to the animal and vegetable kingdoms, in a word, science, conducts us to the conclusion, _there exists but one species of man._ "This result, I do not fear to say, is of great and serious importance; for it creates in our minds an idea of the universal fraternity of science and reason, the only schools that many persons recognize at this present time.