Many defend slavery on the plea that it softened and softens the results of wars and inroads; that prisoners, once slaughtered, are preserved for the sake of being sold into slavery. But already, during the so-called heroic age of Greece, wars and forays were made for the express purpose of getting captives or for kidnapping. The robber or pirate was always sure to find a buyer for his booty, otherwise he would have had no inducement to act. And thus slavery, instead of softening war, was its very source. The Greeks of the heroic age were incited to make inroads and depredations by the facility and security they had of profitably disposing of their captives by selling them into slavery. The bloody drama played, many, many centuries ago, in Peloponnesus and Greece, on the Ionian and Egean seas, and among the islands of the Archipelago, is repeated to-day on both sides of the Atlantic--on African and on American shores and islands. The tribes in Africa war with each other, destroy and burn towns and villages, expressly and exclusively because they find customers for slaves among Christians, and among self-styled civilized, humanized white men. Thus much for the assertion that American slavery contributes to soften the fate of prisoners of war in Africa, and humanizes the savages. It bestializes them, together with their piratical purchasers and their Southern patrons. The analogy holds good here, at a distance of many thousand years and many thousand miles, among different social conditions, in a different civilization, and in the higher moral development of the white man. New invasions successively rolled over the valleys of Hellas; they changed considerably the social condition of the populations, expelling or subduing many of the former occupants and yeomen. From the north, from Thessaly, poured Hellenes, Heraclides, and Dorians, west and south, principally into the Peloponnesus. Henceforth the whole Greek family was represented in history by two cardinal social, political, and intellectual currents, through the so-called Doric and Ionic races.