In those days it was thought that only through the principle of nationality could freedom be established, and here, again, the changes which had happened had made this ideal seem less needed than it was. The principle of nationality was held to make for peace and was quite consistent with cosmopolitanism, which played a leading part in conceptions of what was needed for the happiness of the world. There was rather more in the old ideals of the moral element and less of the material element than there was to-day; there was, too, rather more of a sanguine spirit, and the golden age seemed nearer then it seemed now.