_Language Is an Important Social Function_.--Whatever conjectures may be made by philosophers or definite knowledge determined by philologists, it is certain that language has been {124} built up by human association. Granted that the physiological function of speech was a characteristic of the first beings to bear the human form, it is true that its development has come about by the mental interactions of individuals. No matter to what extent language was used by a given generation, it was handed on through social heredity to the next generation. Thus, language represents a continuous stream of word-bearing thought, moving from the beginning of human association to the present time. It is through it that we have a knowledge of the past and frame the thoughts of the present. While it is easy to concede that language was built up in the attempt of man to communicate his feelings, emotions, and thoughts to others, it in turn has been a powerful coercive influence and a direct social creation. Only those people who could understand one another could be brought into close relationships, and for this purpose some generally accepted system of communicating ideas became essential. Moreover, the tribes and assimilated nations found the force of common language in the coherency of group life. Thus it became a powerful instrument in developing tribal, racial, or national independence. If the primal force of early family or tribal organization was that of sex and blood relationship, language became a most powerful ally in forcing the group into formal social action, and in furnishing a means of defense against the social encroachments of other tribes and nations.