Pope Leo XIV calls for AI disarmament in first encyclical

At a glance:

• Pope Leo XIV published his first encyclical, "Magnifica humanitas," calling for the disarmament of artificial intelligence
• The 245-paragraph document targets monopolistic control of AI and explicitly forbids algorithmic warfare
• Anthropic co-founder Chris Olah presented alongside Vatican officials, highlighting tensions with Trump administration's AI race stance

Historical Context and Significance

Pope Leo XIV has made history by publishing the first encyclical of his papacy dedicated entirely to artificial intelligence. Titled "Magnifica humanitas," the 245-paragraph document represents a profound shift in how the Catholic Church addresses emerging technologies. As the first American pope and a former mathematics major at Villanova University, Leo brings a unique perspective to this technological discourse, blending theological authority with technical understanding. The encyclical was signed on May 15, coinciding with the 135th anniversary of Pope Leo XIII's landmark encyclical "Rerum novarum," which established Catholic social teaching for the industrial age. This deliberate framing positions "Magnifica humanitas" as a successor document for the AI era, attempting to provide moral guidance for a technology that is rapidly reshaping human society.

The significance of this document cannot be overstated. An encyclical, by design, is not merely a policy recommendation but a foundational moral framework that shapes subsequent discussions and potential regulations. Pope Leo XIV personally presented the encyclical rather than delegating it to cardinals, breaking with tradition and emphasizing its importance. The document addresses the world's 1.4 billion Catholics while clearly intending to influence broader global conversations about AI governance. In doing so, the Vatican is positioning itself as a moral authority in one of the most consequential technological debates of our time.

Core Principles: Disarming AI

At the heart of "Magnifica humanitas" is the concept of "disarming artificial intelligence." This phrase, which might seem counterintuitive in a technological context, carries profound meaning according to the pope's writing. "To disarm means discrediting the assumption that technical power automatically confers the right to govern," the encyclical states. The pope clarifies that disarming does not mean rejecting technology outright but rather preventing it from dominating humanity. This represents a fundamental reassertion of human dignity and moral primacy over algorithmic decision-making in a world where AI systems increasingly influence critical aspects of human life.

The encyclical identifies two primary targets of concern: monopolistic control and algorithmic warfare. Regarding concentration of power, the document calls for AI to be made more "human-friendly" and freed from "monopolistic control" – language that directly challenges the handful of American tech firms currently defining the technology's frontier. On warfare, the pope is unequivocal: "No algorithm can make war morally acceptable," he writes. "AI does not remove the intrinsic inhumanity of conflict, indeed it can only bring about conflict more quickly and render it more impersonal." These positions place the Vatican at odds with current trends in both corporate consolidation and military applications of AI.

Presentation and Key Participants

The presentation of the encyclical on Monday at the Vatican Synod Hall carried significant symbolic weight. The choice of speaker for the launch underscored the document's themes: Christopher Olah, Anthropic's co-founder and head of interpretability research, presented alongside cardinals. This pairing of a leading AI researcher with Church officials created a powerful visual representation of the encyclical's call for human-centered technology. Anthropic, founded in part by former OpenAI researchers, has positioned itself as a safety-focused alternative in the AI landscape, making the company's involvement particularly relevant to the document's concerns about monopolistic control and ethical deployment.

The presence of Anthropic's leadership adds another layer to the document's significance. The company has spent the past two months at the center of a global debate over the security implications of "Mythos," its autonomous vulnerability-discovery model that has identified thousands of zero-day vulnerabilities across major operating systems. Anthropic has also clashed with the Trump administration over the use of its technology in war and surveillance contexts, positioning the company as a potential ally to the Vatican's stance on algorithmic warfare. This convergence of interests between the Church and certain AI developers creates an unusual alliance in the broader technology governance landscape.

Political Reactions and Tensions

The encyclical has already drawn responses from political figures, particularly in the United States. Vice President JD Vance, a Catholic convert with connections to early OpenAI investor Peter Thiel, addressed the document at a press briefing on May 19. "When the leader of the world's largest Christian denomination speaks on an issue like that, it's certainly going to have some influence," he stated. "And I'm sure it'll contain a lot of insights, some of which I'll probably agree with, some of which I may not." While Vance acknowledged the pope's influence, he simultaneously reiterated President Trump's position that "wants us to win the AI race against all other countries in the world" – a direct contrast to the encyclical's call for restraint and human-centered development.

The tension between the Vatican and certain political figures extends beyond recent statements. Peter Thiel, a prominent tech investor and Trump ally, spent part of March in Rome delivering closed-door lectures at Palazzo Taverna on the figure of the Antichrist. Drawing on a thesis that a one-world technocratic government might emerge under the pretext of averting AI, nuclear, or climate-driven catastrophe, Thiel's views have been sharply criticized by Church officials. Father Paolo Benanti, the Vatican's adviser on AI, responded in an op-ed describing the lectures as "a sustained act of heresy" against the liberal consensus. These differing worldviews represent a deeper ideological divide about the future role of technology in governance and society.

Theological and Philosophical Foundations

"Magnifica humanitas" is grounded in Catholic social teaching but extends it into the digital realm. The document places "human dignity" and "shared standards of social justice" at the center of any future regulatory architecture, effectively creating a moral framework for AI governance that prioritizes human flourishing over technological advancement for its own sake. This approach represents a significant theological contribution to the AI ethics conversation, moving beyond utilitarian calculations to emphasize the intrinsic value of human persons and communities.

The encyclical's framing of AI as a technology that "has begun to dominate the people it was built to serve" reflects a growing concern among ethicists about the alignment problem in AI development. By positioning human moral agency as superior to algorithmic decision-making, the document challenges the technological determinism that often accompanies AI development. This perspective offers an alternative vision for AI governance that emphasizes democratic participation, transparency, and accountability – values that have sometimes been overshadowed in the race for technological superiority.

Global Implications and Future Outlook

The publication of "Magnifica humanitas" comes at a critical juncture in global AI governance discussions. While not a binding policy document, the encyclical carries significant moral authority that could influence regulatory frameworks worldwide. The document's call for breaking up monopolistic control of AI resonates with growing antitrust concerns in both the United States and Europe, while its prohibition on algorithmic warfare aligns with emerging international norms around lethal autonomous weapons systems.

As AI continues to advance rapidly, the Vatican's intervention adds an important voice to the chorus calling for ethical guardrails. The encyclical's emphasis on human dignity and moral primacy offers a counterweight to purely economic or military considerations that have often dominated AI policy discussions. Whether this theological perspective will translate into concrete policy changes remains to be seen, but the document has already succeeded in elevating the moral dimensions of AI development in global discourse. In a technology landscape increasingly dominated by powerful corporations and nation-states competing for supremacy, the pope's call for "disarming AI" represents a bold assertion of human values over technological power.