own particular reminder that the refined footsteps of the aristocracy through history carry the rather less refined spoor of racism. Following the expulsion of the Arabic Moors and most of the Sephardic Jews from the Iberian peninsula, the remaining Jews and Muslims were forced to convert to Roman Catholicism, becoming "New Christians", who were sometimes discriminated against by the "Old Christians" in some cities (including Toledo), despite condemnations by the Church and the State, which both welcomed the new flock. The Inquisition was carried out by members of the Dominican Order in order to weed out the converts who still practiced Judaism and Islam in secret. The system and ideology of the limpieza de sangre ostracized false Christian converts from society in order to protect it against treason. The remnants of such legislation persevered into the 19th century in military contexts. In Portugal, the legal distinction between New and Old Christian was only ended through a legal decree issued by the Marquis of Pombal in 1772, almost three centuries after the implementation of the racist discrimination. The limpieza de sangre legislation was common also during the colonization of the Americas, where it led to the racial and feudal separation of peoples and social strata in the colonies. It was however often ignored in practice, as the new colonies needed skilled people. At the end of the Renaissance, the Valladolid debate (1550–1551), concerning the treatment of the natives of the "New World" pitted the Dominican friar and Bishop of Chiapas, Bartolomé de Las Casas, to another Dominican and Humanist philosopher, Juan Ginés de Sepúlveda. The latter argued that the Indians practiced human sacrifice of innocents, cannibalism, and other such "crimes against nature"; they were unacceptable and should be suppressed by any means possible including war, thus reducing them to slavery or serfdom was in accordance with Catholic theology and natural law. To the contrary, Bartolomé de Las Casas argued that the Amerindians were free men in the natural order and deserved the same treatment as others, according to Catholic theology. It was one of the many controversies concerning racism, slavery, religion, and European morality that would arise in the following centuries and which resulted in the legislation protecting the natives. The marriage between Luisa de Abrego, a free black domestic servant from Seville and Miguel Rodríguez, a white segovian conquistador in 1565 in St. Augustine (Spanish Florida), is the first known