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Catholic Church and slavery

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Through Middle Ages, Portugal and Roman Empire

By the 1800s, the Church reached relative consensus in favor of condemning chattel slavery and praising its abolition.

History

After 313, when Constantine legalized Christianity within the Roman Empire, Church teachings concerning charity and justice began influencing Roman laws and policies. Pope Callixtus I (bishop of Rome 218–222) was a slave in his youth. Slavery decreased with multiple abolition movements in the late 5th century.

Catholic clergy, religious orders, and popes owned slaves, and the naval galleys of the Papal States used captured Muslim galley slaves in particular. Some Catholic saints appeared to have owned slaves, including Philemon of Colossae, Gregory of Tours and Marie-Marguerite d'Youville. Catholic teaching began, however, to turn against slavery from 1435.

While the Age of Discovery greatly increased the number of slaves owned by Christians, the response of the clergy, under strong political pressures, was ineffective in preventing the establishment of slave-owning societies in the colonies of Catholic countries. Earlier Papal bulls, such as Pope Nicholas V's Dum Diversas (1452) and Romanus Pontifex (1454) were used to justify enslavement during this era.

An early shipment of Black Africans during the transatlantic slave trade was initiated at the request of Bishop Las Casas and authorized by Charles V, Holy Roman Emperor in 1517. However, Las Casas later rejected all forms of "unjust" slavery and became known as the protector of Indian rights.

Multiple popes issued papal bulls condemning mistreatment of Native Americans and "unjust" enslavement ("just" enslavement was an accepted form of punishment); however, these were largely ignored. Nonetheless, Catholic missionaries such as the Jesuits worked to alleviate the suffering of Native American slaves. Debate about the morality of slavery continued throughout this period. Some books critical of slavery were placed on the Index of Forbidden Books by the Holy Office between 1573 and 1826. Capuchin missionaries were excommunicated for calling for the emancipation of black slaves in the Americas, although they were reinstated when the Holy Office under Pope Innocent XI sided with them rather than the bishop who had excommunicated them.

Throughout the 1700s and 1800s, the Church did missionary work in the Americas, targeting both slave and non-slave. On 22 December 1741, Pope Benedict XIV promulgated the papal bull Immensa Pastorum Principis against the enslavement of the indigenous peoples of the Americas and other countries. Pope Gregory XVI in his 1839 bull In supremo apostolatus also condemned slavery as contrary to human dignity. In 1866, the Holy Office of Pope Pius IX stated that, subject to conditions, it was not against divine law for a slave to be sold, bought, or exchanged. Pope Leo XIII in 1888 wrote to the bishops of Brazil setting forth the position of the Church on slavery: he condemned the cruelties of the slave-trade and commended the abolition of slavery in the region.

In 1995, Pope John Paul II repeated the condemnation of "infamies", including slavery, issued by the Second Vatican Council:

Thirty years later, taking up the words of the Council and with the same forcefulness I repeat that condemnation in the name of the whole Church, certain that I am interpreting the genuine sentiment of every upright conscience.

In 2026, Pope Leo XIV, through his encyclical Magnifica Humanitas, "sincerely ask for pardon" for the Church's delay in denouncing "the scourge of slavery" throughout history:

Although there was not always consistency in practice — given that slavery was long tolerated before being unequivocally condemned — there has been a continuous affirmation throughout history of the dignity of every human being, created in the image of God, even if it took eighteen centuries for its full incompatibility with slavery to be explicitly recognized. This constitutes a wound in Christian memory, one from which we cannot consider ourselves detached. It is impossible not to feel deep sorrow when contemplating the immense suffering and humiliation endured by so many in stark contrast to their immeasurable dignity as persons infinitely loved by the Lord. For this, in the name of the Church, I sincerely ask for pardon.

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