As an additional protective measure Constantine withdrew the right of liberty that the Antonines had secured to foundling children, and in order to encourage strangers to pick up waifs cast away by parents, the Emperor made them the slaves of those who raised them. The father was punished for rejecting his infant by being no longer able to claim a right that had previously been his. Rather than that there should be murder, the Emperor went further; he gave poor parents the right to sell their new-born children. One more step and the story of the Roman child ends. The Emperor Valentinian, a strange mixture of cruelty and sense—the same who kept two ferocious she-bears near him and saw that they had human food a-plenty,—is in the books as the author of the law condemning the exposition of new-born infants. It was in 374 that this edict was issued in the name of the Emperors Valentinian, Valens, and Gratian, declaring that whosoever should expose his children should be subject to punishment.[366] CHAPTER XVIII PLEAS OF THE CHRISTIAN FATHERS. It has been said that the only way to understand the Middle Ages is to comprehend that the Roman Empire did not die down, or fade away; it remained, or continued to be the centre of civilized government, until comparatively recent times. In fact, nominally the Holy Roman Empire, the direct descendant of the Roman Empire, did not pass away as an idea until 1806, when the Emperor Joseph II. announced to the Germanic Diet his refusal to carry any longer the title of Emperor of the Romans.[367] Even when the Roman Empire was at its greatest point of power and wealth, the actual founders of the Holy Roman Empire were at work in Rome itself, in the persons of the Christian Fathers; for, after all, it was the Church that was to rule the world once swayed by Roman legions. The men who, as representatives of Christ, were later to tame the barbarians, really laid the foundations for the future greatness of Christian Rome, amid the very luxury and opulence of the pagan Rome soon to pass away. The struggles of these Christians among the polished and cruel Romans was, in a way, a preparation for the struggle to come later with the unpolished, but equally cruel, barbarians. In their conquest of the Roman world, the Christian founders saved their religion; in the conquest of the barbarian hordes, they saved civilization; without Christianity the German and Celtic races, with their lustful, revengeful, and passionate natures, either might have overwhelmed Roman civilization entirely, bringing on a night of barbarism, or have been themselves “corrupted and destroyed by the vices and sensuality which surrounded them.”[368]