Pope Leo XIV Condemns Vatican’s Historical Role in Slavery, Unveils Encyclical on AI Ethics

Pope Leo XIV made history on May 24, 2026, by formally apologizing for the Holy See’s past role in legitimizing slavery, marking a pivotal moment in the Catholic Church’s ongoing efforts to confront its historical complicity in systemic injustice. The apology came during a Pentecost Mass at St. Peter’s Basilica, where the pontiff also introduced his first major encyclical, Magnifica humanitas, which addresses the ethical challenges of artificial intelligence (AI) in safeguarding human dignity.

A Historic Apology for Historical Wrongs

The Pope’s remarks followed a growing global reckoning with the Church’s historical ties to slavery, particularly during the transatlantic trade era. In his address, Leo XIV acknowledged the “grave sin” of the Holy See’s past actions, stating, “We humbly ask forgiveness for the role our institutions played in perpetuating systems of human bondage.” The apology was widely praised by historians and religious leaders, who emphasized its significance in fostering reconciliation and moral accountability.

The statement aligns with recent scholarly research highlighting the Church’s complex relationship with slavery, including its use of enslaved labor in papal estates and its failure to condemn the practice in key historical documents. The Pope’s words were described by Vatican News as “a profound step toward truth-telling and healing.”

Encyclical on AI Ethics: Magnifica humanitas

On May 25, 2026, Pope Leo XIV presented his encyclical Magnifica humanitas during a formal audience at the Vatican. The document, titled “On Safeguarding the Human Person in the Time of Artificial Intelligence,” outlines the Church’s vision for ethical AI development, emphasizing the need to protect human dignity, privacy, and social justice in the face of rapid technological advancement.

The encyclical warns against the “dehumanizing potential” of AI, urging governments and tech companies to prioritize ethical frameworks that prevent discrimination, surveillance, and the erosion of human autonomy. It also calls for greater collaboration between religious institutions, scientists, and policymakers to ensure AI serves the common good.

Cardinal Pietro Parolin, Vatican Secretary of State, highlighted the encyclical’s relevance during its presentation, stating, “In an age of unprecedented innovation, the Church has a moral duty to remind humanity of its highest aspirations.” The document is expected to influence global debates on AI regulation and shape the Catholic Church’s role in technological ethics.

Context and Reactions

The Pope’s actions come amid heightened scrutiny of the Church’s historical legacy and its response to modern challenges. His apology and encyclical reflect a broader strategy to reconcile past failures with contemporary moral leadership. Analysts note that the timing—just months after his 2025 election—signals a commitment to addressing both historical and emerging ethical crises.

While some critics argue the apology is symbolic, others view it as a necessary step toward transparency. The encyclical, meanwhile, has been praised for its forward-looking perspective, though questions remain about its practical impact on global AI governance.

As the Catholic Church continues to navigate its role in a rapidly evolving world, Pope Leo XIV’s initiatives underscore a dual focus: confronting the past with humility and guiding the future with moral clarity.