Las Casas argued that the conquest was unlawful, insisting that charges of cannibalism were “sheer fables and shameless nonsense.” The opposing argument was made by Juan Ginés de Sepúlveda, Spain’s royal historian, who had never been to the New World. A translator of Aristotle, Sepúlveda cited Aristotle’s theory of natural slavery. He said that the difference between the natives and the Spaniards was as great as that “between apes and men.” He asked, “How are we to doubt that these people, so uncultivated, so barbarous, and so contaminated with such impiety and lewdness, have not been justly
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