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that of force. And though the original law of force remained in full operation between them and their slaves, and also (except so far as limited by express compact) between a commonwealth and its subjects, or other independent commonwealths; the banishment of that primitive law even from so narrow a field, commenced the regeneration of human nature, by giving birth to sentiments of which experience soon demonstrated the immense value even for material interests, and which thenceforward only required to be enlarged, not created. Though slaves were no part of the commonwealth, it was in the free states that slaves were first felt to have rights as human beings. The Stoics were, I believe, the first (except so far as the Jewish law constitutes an exception) who taught as a part of morality that men were bound by moral obligations to their slaves. No one, after Christianity became ascendant, could ever again have been a stranger to this belief, in theory; nor, after the rise of the Catholic Church, was it ever without persons to stand up for it. Yet to enforce it was the most arduous task which Christianity ever had to perform. For more than a thousand years the Church kept up the contest, with hardly any perceptible success. It was not for want of power over men's minds. Its power was prodigious. It could make kings and nobles resign their most
