Respecting the moral side, in general, of the slave system of antiquity, which we encounter now for the first time here among the Egyptians, the following observation may be made. If we except the Hebrews, we shall not find among the peoples of the ancient world whose ethical standards we shall pass in review any fundamental change throughout their history in the common conscience regarding the rightfulness of slavery. Indeed any radical and permanent change in the moral feelings of men on this subject was hardly possible till after the incoming of Christianity with its teachings of a common Father-God and the brotherhood of man. [Sidenote: The ethics of war] One of the most striking phenomena of the moral evolution of mankind is the unequal rate of movement on different lines. Thus while morality has made great progress in some departments of life, in the domain of war it has remained comparatively stationary from the dawn of history down almost to the present day. The war code of the modern nations, notwithstanding improvements and ameliorations to which our attention will be drawn later in our study, is still in large part an unchanged heritage from the ages of primitive savagery. Bearing this in mind, it will not be a matter of surprise to us that the laws of war of the Egyptians showed little advance the practices of the negro savages of Africa; indeed it seems probable that this part of the moral code of Egypt was actually of African origin.[95] There is not a word in Egyptian literature in reprobation of war.[96] While in their relations to their own people the Pharaohs observed a comparatively enlightened code of ethics, being in general humane, considerate, and clement, still in their treatment of the vanquished they seem to have been wholly insensible to all humanitarian feelings. Like the Assyrian kings they “immortalized their cruelty in their art.” Numerous scenes upon the monuments celebrate the Pharaoh’s inhumanity; not one celebrates his compassion or mercy. He is constantly represented in the act of slaying in heaps with his own hands his bound and suppliant captives.[97] [Sidenote: Influence of the moral ideal upon Egyptian life and history] Taken altogether, the moral standard of ancient Egypt, as disclosed in the foregoing brief account of what the Egyptian conscience condemned and what it approved, was not a high one, but it was, in so far as it concerned the everyday life of the people, wholly practical, and probably was as well lived up to by the masses as our higher ideal of character is lived up to by ourselves. We have a right to infer this from the persistence of Egyptian institutions through two thirds of the historic millenniums; for no nation or society can long endure where the relations of man to man and of subject to ruler are not in substantial agreement with the real convictions of the age as to what constitutes essential justice and righteousness.