Summary:

Among the various intellectual activities of the last fifty years none has awakened a more widespread interest than that of the study of the evolution of human civilization. The reason is apparent: it has revolutionized our conception of human history, and has shaken to their very centre the religious traditions of Europe and civilized America. The general doctrine of evolution as applied to the universe at large was established shortly after the middle of the nineteenth century by Darwin and Spencer. Geology had already revealed the enormous age of the earth, and the long procession of periods through which the flora and fauna had advanced to ever higher organization. Archæology had begun its enquiries into the antiquity of man; but the evidence was not yet fully understood, and its weight or even its existence was denied.