The diffusion of a few forms of speech has played a great part in both phases. Greek was spoken over the eastern half of the Roman world in the second century A.D., though not to the extinction of such tongues as Syriac and Egyptian. Latin was similarly spoken over the western half, though not to the extinction of the tongues we now call Basque and Breton and Welsh; and Latin continued to be the language of religion, of law, of philosophy, and of serious prose literature in general till the sixteenth century. So now, several of the leading European tongues are spoken far beyond the limits of their birthplace, and their wide range has become a powerful influence in diffusing European culture. German, English, Russian, Spanish, and French are available for the purposes of commerce, and for those who read books over nineteen-twentieths of the earth’s surface. The languages of the smaller non-European peoples are disappearing in those places where they have to compete with these greater European tongues, except in so far as they are a medium of domestic intercourse. Arabic, Chinese, and in less degree Persian are the only non-European languages which retain a world importance. English, German, and Spanish are pre-eminently the three leading commercial languages. They gain ground on the rest, and it is English that gains ground most swiftly. The German merchant is no doubt even more ubiquitous (if the expression be permitted) than is the English; but the German more frequently speaks English than the Englishman or American speaks German. [Sidenote: Linking the Nations Together] It has already been observed that assimilation has advanced least in the sphere of institutions, ideas, and literature. The question might, indeed, be raised whether the types of thought, of national character, and of literary activity represented by the five or six leading nations are not rather tending to become more accentuated. The self-consciousness of each nation, taking the form of pride or vanity, leads it to exalt its own type and to dwell with satisfaction on whatever differentiates it from other types. Nevertheless there are influences at work in the domain of practice as well as of thought, which, in creating a common body of opinion and a sense of common interest among large classes belonging to these leading nations, tend to link the nations themselves together. Religious sympathy, or a common attachment to certain doctrines, such as, for instance, those of Collectivism, works in this direction among the masses, as the love of science or of art does among sections of the more educated class. As regards the peoples not of European stock, who are, broadly speaking, the more backward, it is not yet possible to say what will be the influence of the European type of culture upon their intellectual development.