This statement is, of course, restricted to that part of the human race which forms the principal subject of universal history and is included within the sphere of the Greco-Roman intellectual and political dominion. The Chinese, and the nations of similar origin and character, are a nullity in universal history. The Hindoos have remained to this day outside of the current of the catholic movement of Christianity. The barbarian and savage races have only been capable of receiving Christianity together with civilization from nations previously civilized. What conquests Christianity may yet make among the great mass of the heathen who constitute the numerical majority of mankind, only the future can disclose. Probably the dominion of European intelligence and political power will be a necessary condition for the extension of the spiritual dominion of the Catholic Church in those regions of the world, if it is ever accomplished. Leo says of the Mongolian races: “It seems to us that it is only their conversion to Christianity which can entitle them to admission into the domain of universal history as we have conceived its plan, and this conversion can hardly become general except through some kind of political subjugation and dependence. Certainly, the place of these nations in history is one foreseen by God; but the period of their intellectual importance for us has not yet arrived, and will perhaps never come until they are conquered by the Caucasian race and mingled with it. It is therefore only upon the Caucasians, in their great division of Semites, Japhetians, and Chamites, that we can direct our view, as being hitherto the workmen whose labors are recorded by universal history.”