Pope Leo XIV builds on teachings of prior pontiffs with apology for slavery, Church’s role

Pope Leo XIV built on teachings laid out by his predecessors when he apologized for the Catholic Church’s role in slavery in his May 15 encyclical Magnifica Humanitas, but the Holy Father also critiqued papal bulls issued in the late Middle Ages on the subject.

“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,” Leo XIV wrote of the institution of slavery.

“For this, in the name of the Church, I sincerely ask for pardon,” he wrote.

The Holy Father explained that in antiquity and the Middle Ages, Catholic individuals and some ecclesiastical institutions participated in slavery. Though the Church never taught doctrinally that slavery was morally good or neutral, he wrote about popes who “intervened several times in order to regulate and legitimize forms of subjugation” at the request of political leaders.

Leo XIV wrote that “a formal, absolute, and universal condemnation of slavery” was not issued until Pope Leo XIII’s 1888 encyclical on the abolition of slavery. Leo XIV added that “we [cannot] deny or diminish” the Church’s delay in its denouncement.

“In the development of her doctrine, the Church has gradually come to a deeper awareness of the gravity of these issues,” Leo XIV wrote.

Church’s role in slavery

In a footnote in the encyclical, Leo XIV cited four papal bulls from the 1400s as his examples for when the Holy See sought to “regulate and legitimize” subjugation: Pope Eugenius IV’s Sicut Dudum and Etsi Suscepti, and Pope Nicholas V’s Dum Diversas and Romanus Pontifex.

“Political and, at times, even economic needs overcame the demands of the Gospel,” the footnote reads. “The need for evangelization was frequently compromised or at least misunderstood with regard to the needs of worldly powers, thus relativizing the problematic incompatibility of slavery with the Christian conscience.”

Nicholas V’s bulls, for example, authorized the Portuguese to impose slavery on specific non-Christians, particularly Muslims and pagans, related to specific conflicts. Eugenius IV condemned the enslavement of converts to Christianity without condemning the institution of slavery as a whole.

Tom Nash, a staff apologist for Catholic Answers, told EWTN News that St. John Paul II apologized for Christian participation in slavery as well and many popes condemned slavery (including when it was ongoing) but did not critique specific papal bulls on the subject in the way Leo XIV does.

Although Leo XIV’s comments on slavery are substantial, the topic only takes up a few paragraphs of the encyclical, which mostly deals with the Church’s social doctrine in the modern world and technological developments such as artificial intelligence.

Nash emphasized that the faithful should not interpret these paragraphs as a change in Church doctrine, however, because in spite of Catholic participation in slavery, “the Church has never definitively taught that chattel slavery was morally just.”

Although Leo XIV cited Sicut Dudum as an example, one of Eugenius IV’s main priorities was to “oppose the mistreatment of all African natives,” according to Nash. He quoted the bull: “They have deprived the natives of the property, or turned it to their own use, and have subjected some of the inhabitants of said islands to perpetual slavery, sold them to other persons, and committed other various illicit and evil deeds against them.”

The bull did not sanction slavery but instead excommunicated anyone who enslaved Christians or those seeking baptism. The punishment could only be lifted if the person freed the slaves and returned their property.

Nicholas V’s bulls were different because they explicitly authorized enslavement in certain cases, but Nash said the directives on slavery in Dum Diversas “are not an attempt to teach definitively,” are not pronouncements on doctrinal matters, and they “are certainly up for questioning and criticism.”

“They are prudential judgments and don’t even attempt to invoke the specific doctrinal criteria of a definitive teaching, let alone an ‘ex cathedra’ pronouncement,” Nash added. “And thus the Church’s teaching on infallibility is not [in] play and therefore not in doubt.”

One condition for infallible doctrinal pronouncements is that they must apply to all people at all times. The bulls from Nicholas V apply only “in a particular geographical situation in a particular time in history,” he said, and emphasized that “we cannot treat every papal statement as if it’s an infallible declaration.”

Papal condemnations of slavery

Although Leo XIII delivered one of the strongest condemnations of slavery in the late 1800s, Nash noted Pope Paul III’s papal bull Sublimis Deus in 1537 strongly rebuked enslavement of Indigenous Americans more than three centuries earlier.

The 16th-century pontiff blamed Satan for chattel slavery and for the mindset that Indigenous Americans “should be treated as dumb brutes created for our service.” He urged evangelization of the people and said they should not be enslaved or deprived of liberty or property.

Paul III’s bull expressly stated that this prohibition on enslavement of the Indigenous Americans applies regardless of anything that has been issued before, effectively superseding Nicholas V’s papal bulls from a century earlier.

Other popes in between Paul III and Leo XIII issued similar antislavery statements, with Pope Gregory XIV issuing an apostolic brief in 1591 demanding an end to the enslavement of people in the Philippines and Pope Urban VIII writing the 1639 papal bull Commissum Nobis, which condemned the enslavement of South Americans.

In the early 1800s, Pope Pius VII wrote to government leaders to urge the abolition of the slave trade and Pope Gregory XVI in 1839 issued the papal brief In Supremo Apostolatus, which was the first to condemn the slave trade in its entirety.

Nash noted that Christian opposition to slavery, however, is rooted in the teachings of Jesus Christ, who “reaffirms the inherent dignity of every human person in a Roman-Empire milieu that had chattel slavery as a societal institution.”

“He did so in giving the doctrinal command, ‘You shall love your neighbor as yourself’ (Mt 22:39),” he said. “Indeed, ‘neighbor’ includes everyone (see Gn 1:26-27), including the heretical Samaritans and other despised persons (Lk 10:25-36). Similarly, ‘the least of these my brethren’ unmistakably includes chattel slaves within a Roman-Empire milieu (Mt 25:40, 45).”

St. Paul wrote about slavery several times. In Ephesians 6, he told slaves to “obey your human masters” and for masters to “stop bullying,” adding that both have the same Master in heaven, before whom “there is no partiality.” In 1 Corinthians 7, he told slaves to “make the most of it” if they gain freedom but not to be concerned about it because “the slave called in the Lord is a freed person in the Lord, just as the free person who has been called is a slave of Christ.”

In contrast to norms of the time, Paul wrote about the equal human dignity of slave and master in Galatians 3, saying “there is neither slave nor free person” because “you are all one in Christ Jesus.” In the Epistle to Philemon, Paul writes to St. Philemon on behalf of the runaway slave, St. Onesimus, asking Philemon to receive him “no longer as a slave but more than a slave, a brother.”

At least one pope — St. Callistus I, who reigned from A.D. 218 until he was martyred in A.D. 222 — was a former slave. Nash noted that although slavery existed in the Roman Empire and within Europe under Christendom, the practice was reduced significantly when Christianity replaced paganism.

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