Pope Leo XIV

Pope Leo XIV is the Bishop of Rome and head of the Catholic Church, elected in May 2025 and the first American-born pope in the Church's history. From his second day in office he has made artificial intelligence a recurring subject of Catholic social teaching, culminating in his first encyclical, Magnifica humanitas (released May 25, 2026), the first papal encyclical centered on AI. He has framed AI as a "new kind of industrial revolution, a cognitive one," called for AI to be "disarmed," and made the concentration of AI power among private actors a central concern.

AI-relevant statements and interventions

In his first address to the College of Cardinals on May 10, 2025 — his second day as pope — Leo XIV named AI as a central concern for Catholic social teaching:

"In our own day, the Church offers to everyone the treasury of her social teaching in response to another industrial revolution and to developments in the field of artificial intelligence that pose new challenges for the defence of human dignity, justice and labour."

The "industrial revolution" framing draws on Leo XIII's 1891 encyclical Rerum Novarum, which defined the Church's modern social teaching in response to the first Industrial Revolution; the name choice (Leo XIV) signals continuity with that framing for the AI era. The address was the first papal statement to make AI a pillar of Catholic social teaching, placing it in the inaugural address that set papal priorities rather than as a passing reference. The Vatican is among the few non-governmental, non-industry civil-society institutions with global reach engaging the AI debate at this level.

The New York Times (Rich, Povoledo and Dias, May 25, 2026) consolidated Leo's pre-encyclical AI interventions: the May 10, 2025 cardinals' address; a December 2025 trip to Turkey and Lebanon during which AI was addressed publicly; a December 5, 2025 address to Catholic university leaders on AI ethics (Source: vatican.va); a March 13, 2026 International Day of Mathematics message referencing AI (Source: vatican.va); the April 24, 2026 Vatican AI framework; the May 18, 2026 Interdicasterial AI Commission; and the May 25, 2026 release of Magnifica humanitas (Source: nytimes.com).

Vatican AI framework and clergy directives (April 24, 2026)

Leo XIV issued his first concrete AI operational directives on April 24, 2026 in a formal Vatican AI framework that bans the use of AI to write homilies and sets guardrails for Catholic institutions. The framework came alongside two parallel Vatican moves: an expansion of the Holy See's cybersecurity posture and the advancement of a state-level AI governance framework for Vatican City (Source: axios.com).

The directive was the first time a major religious institution issued a clergy-facing AI usage prohibition tied to the integrity of pastoral speech, distinct from broader ethical statements, translating the inaugural address's "human dignity" framing into a concrete labor-and-craft rule for the Church's own internal practice. Reuters and Bloomberg coverage between April 25-26, 2026 framed the move as "institutional resistance to AI displacement of clerical authority and doctrinal control."

Interdicasterial AI Commission (May 18, 2026)

The Vatican announced on May 18, 2026 the establishment of an Interdicasterial Commission on Artificial Intelligence, marking formal Catholic Church entry into AI governance deliberations (Source: vaticannews.va). The Commission is a permanent cross-dicasterial body and the institutional companion to the May 25 encyclical, paralleling the way the Church coordinated interdicasterial work on social teaching during the Industrial Revolution era.

First encyclical — Magnifica humanitas (May 25, 2026)

Pope Leo XIV released his first encyclical, Magnifica humanitas ("Magnificent humanity"), on May 25, 2026, the first papal encyclical centered on AI. The document was signed May 15, 2026, the 135th anniversary of the May 15, 1891 issuance of Leo XIII's Rerum Novarum, which defined the Catholic Church's modern social teaching during the first Industrial Revolution (Source: washingtonpost.com). Encyclicals are the most formal mode of Catholic doctrinal teaching, addressed to the universal Church. The full encyclical is held as a foundational source page, Magnifica Humanitas — Encyclical Letter of Pope Leo XIV (15 May 2026), with the canonical quotes below verified against the official Vatican text. The English version runs roughly 42,300 words (described variously as a "42,000+ word" and "55-page" document, 51 pp.), among the longest papal encyclicals in modern memory and substantially longer than Rerum Novarum. The canonical Vatican text is at vatican.va/content/leo-xiv/en/encyclicals/documents/20260515-magnifica-humanitas.html, confirming the May 15, 2026 signing date and the formal title "Magnifica Humanitas" (Source: nytimes.com).

Core arguments

• AI as cognitive industrial revolution. Leo positions AI as a "new kind of industrial revolution, a cognitive one," continuous with his namesake's Rerum Novarum framing.
• Power concentration. "AI tends to amplify the power of those who already possess economic resources, expertise and access to data… small but highly influential groups can shape information and consumption patterns, influence democratic processes and steer economic dynamics to their own advantage, undermining social justice and solidarity among peoples."
• Babel vs. Jerusalem. "The primary choice is not between a 'yes' or 'no' to technology, but rather between constructing Babel or rebuilding Jerusalem; between a power that claims to dominate the heavens and a people who work together in the presence of God to rebuild the walls of fraternal coexistence."
• Regulation and pushback on "decelerationist" framing. Countering tech-industry framing of critics as "decelerationists" or "doomers": "asking for caution in how AI is developed does not mean opposing progress in general. Human society must develop strong legal frameworks and oversight of AI before it is allowed to advance further."
• AI in war. The encyclical argues AI is making war "more impersonal." Verses on power can be read as criticism of the Trump White House and of IDF, Ukrainian, and other militaries using AI in targeting.
• Dehumanization. Leo describes the spiritual risk as "flattening differences, reducing them to 'data and performance,' turning them into means, working endlessly to perfect them."
• Holy See slavery apology. The encyclical includes a formal apostolic apology for the papacy's "past complicity and blindness in the face of the injustice of slavery," the first papal apology drawing a direct line to the papacy itself rather than to historical Christians broadly.
• Limits as virtue. The final line: "No computational system, however sophisticated, can create a heart that gives itself, or a conscience that discerns good from evil."

Canonical quotes and themes

Vatican News' official AI-focused dossier on Magnifica humanitas (recirculated May 27-28, 2026) consolidated several direct quotes previously paraphrased second-hand:

• "Technology is never neutral" — a refutation of the standard "tools are neutral; what matters is use" defense common in industry advocacy.
• "A more moral AI is not enough if that morality is determined by a few" — recontextualizing externally supplied moral guidance as itself insufficient if the determination of that morality remains concentrated.
• "There is no algorithm that can make war morally acceptable" — a rejection of the autonomous-weapons frame, in tension with the Anthropic-DoD dispute and the FY27 NDAA Chairman's Mark on autonomous-weapons rule updates.
• Anti-concentration and anti-speed framing — explicit calls for technologies not to be concentrated in few hands and for work systems not to force humans to adapt to machine speed, the latter engaging AI Labor Disruption and the "agents-over-workers" pattern.

(Source: vaticannews.va)

A Wired Backchannel piece (May 26, 2026) and the May 29 development cycle surfaced two further lines tied to the encyclical's concentrated-power thread: "Technological power takes on a new face, one that is predominantly private," framing AI capability concentration as a private-sector phenomenon and serving as the primary-text anchor for the AI Power Concentration thread; and an invocation of a "digital Babylon" as the risk if power concentration goes unchecked. These lines accompany the "technology is never neutral," "a more moral AI is not enough if that morality is determined by a few," and "there is no algorithm that can make war morally acceptable" quotes, and Olah's same-event acknowledgment that even safety-focused labs remain "immersed in economic, geopolitical, and competitive incentives that can conflict with doing the right thing," making the encyclical's central operative target AI power concentration rather than AI capability per se (Source: wired.com).

National Catholic Reporter coverage (May 25, 2026) surfaced several further lines verbatim:

• AI-personhood limit. AI systems "do not undergo experiences, do not possess a body, do not feel joy or pain," an anthropological argument that AI cannot bear moral agency, anchoring the AI Welfare / Model Welfare / Moral Patienthood / non-reducibility thread.
• Subsidiarity violation. The concentration of power among a "technocratic class of AI developers" violates the Catholic principle of subsidiarity, a more doctrinally specific framing of the AI Power Concentration concern than the "predominantly private" line.
• Data ownership. Data ownership "cannot be left solely in private hands but must be appropriately regulated," the encyclical's most explicit data-governance and regulation claim.
• "New forms of slavery." Leo tied the AI economy to "new forms of slavery" in data labeling and rare-earth extraction, paired with the formal slavery apology and connecting the supply-chain-labor critique to the AI Labor Disruption thread.

(Source: ncronline.org)

"Disarm" framing and broader topic list

Coverage from PBS NewsHour and Big Technology surfaced additional text. Leo wrote that "it's not enough to invoke ethics in the abstract — robust legal frameworks, independent oversight, informed users, and a political system that does not abdicate its responsibility are required," and that "a more moral A.I. is not enough if that morality is determined by a few"; PBS framed the call as a formal papal request that AI be "disarmed" (Source: pbs.org). Big Technology's Alex Kantrowitz and Marty Swant noted the document explicitly calls out war, AI-driven disinformation, surveillance, algorithmic addiction, and the degradation of democracy, broader than the Babel-vs-Jerusalem and labor framings prominent at launch, and surfaced the line "for an algorithm, an error is a flaw to be corrected; for a person, however, an error can be a catalyst for profound change," described as the most quoted single line from the document (Source: bigtechnology.com).

Lethal autonomous weapons

Coverage on May 31, 2026 sharpened the encyclical's military thread: Leo called for the world to "disarm" AI, condemning lethal autonomous weapons and declaring traditional just-war theory "outdated" in the context of AI-driven warfare (Source: ncronline.org). It is the encyclical's most direct intervention into the Autonomous Weapons debate, pairing the "there is no algorithm that can make war morally acceptable" line with a condemnation of weapons that select and engage targets without human judgment, and arguing that the just-war tradition, which presumes human moral agents making proportionality and distinction judgments, cannot govern machine-mediated lethal force. Villanova University, Leo XIV's alma mater, characterized the encyclical as a landmark teaching document on AI and the human person (Source: villanova.edu).

Launch event, audience, and Anthropic involvement

Chris Olah (Anthropic co-founder, who is not Catholic) participated on the launch panel at the Vatican alongside theologians, a Vatican move that fueled criticism that the Holy See was "tacitly lending its seal of approval to a tech juggernaut." Paolo Carozza (Notre Dame, chair of the Meta Oversight Board) is cited noting that "frontier AI companies would love to co-opt religious communities to bring an ethical imprimatur to their work." The Rev. Andrea Ciucci (Pontifical Academy for Life) defended the engagement: "Those who create the technology also have to bear responsibility. So we need to talk to them." The encyclical text reportedly shows Anthropic's influence, describing AI software as something programmers "scaffold" rather than directly code, mirroring Anthropic's own "AI grows" language.

The launch-day audience comprised cardinals, computer scientists, journalists, and diplomats, including Brian Burch, the United States Ambassador to the Holy See and a Trump-administration appointee. Leo pledged to work with Olah "to find a way for humanity in this time of artificial intelligence," and said "What a great sign of hope it is that in our differences we can listen to one another." Olah's launch-panel position praised the initiative, acknowledging that AI companies need moral guidance to avoid being swayed by "a set of incentives and constraints that can sometimes conflict with doing the right thing," with the quotes "We need moral voices that the incentives cannot bend" and "Today is just the beginning — the start of a long collaboration between those of us who are building this and those who can see what we, from the inside, cannot" (Source: nytimes.com).

Pre-release coverage by Nicole Winfield (Crux) highlighted the encyclical as the first Catholic encyclical centered on AI, embedding AI as the subject of a Leonine encyclical in the manner of Rerum Novarum, and characterized Olah's appearance as signaling a safety-first, human-dignity, labor-protective framing and a potential flashpoint with the Trump administration, which has pursued the Pentagon-Anthropic DPA designation and was finalizing a frontier-AI executive order in May 2026 (Source: cruxnow.com).

Tensions with the Trump administration

Some verses on the nature of modern power can be read as criticism of the White House, particularly Leo's assertions that "God does not justify war." This followed verbal attacks by President Trump on the pope and the pope's "stoic but unbowed response."

Reception in Washington

On May 26, 2026, White House AI advisor David Sacks publicly responded to the encyclical by warning against giving governments "sweeping power" over AI, framing the document's call for "robust legal frameworks" and independent oversight as a step toward government "domination" of the technology. It was the first time a senior U.S. government AI official publicly responded to a papal document on AI, and it was consistent with Sacks's same-week intervention that killed the Trump cybersecurity-and-frontier-AI EO on the grounds that even voluntary government testing was a regulatory foothold (Source: insideaipolicy.com).

On June 2, 2026 the encyclical "reverberated through Washington," with the "technology is never neutral" line sharpening the dilemma facing VP JD Vance (a Catholic convert) as he balanced Silicon Valley allies against a skeptical Catholic right. Vance told Air Force Academy cadets he "endorsed" the Pope's view that humans should not "outsource the most important moral decisions to digital technology," and had reportedly told AI CEOs the prior month that Anthropic's Mythos model "scared him," a shift from his 2025 Paris anti-regulation stance (Source: politico.com).

Scholar reception

Scholars were divided on the encyclical's policy impact. Brian Patrick Green (director of technology ethics, Santa Clara University, CA) argued that some technology leaders "will have to take it seriously in a sense," because the encyclical provides them with "a moral imperative" while explicitly recognizing their autonomy; Green framed the Church's posture as institutional foundation-laying rather than rule-making, noting it "does not claim to supplant the responsibilities of politics or institutions, but offers itself as a foundation," urging other institutions to "recognize and promote whatever serves the dignity of persons, the vitality of communities and the common good." Prof. Noreen Herzfeld (director, technology-and-ethics program, St. John's School of Theology and Seminary, Collegeville, MN) said, "I don't think the 'tech bros' in Silicon Valley will listen that much. But I think within the church, it will be there as a reference for priests and bishops and particularly for those of us who are educating seminarians or young people," framing the document's primary audience as Catholic clergy and the faithful rather than the technology industry (Source: nytimes.com; washingtonpost.com).

Relationships

• supports: Magnifica Humanitas — Encyclical Letter of Pope Leo XIV (15 May 2026) — the Pope's first encyclical; canonical primary text for this page's AI coverage.
• supports: Religious and Civil-Society Voices on AI — primary current Catholic voice; inaugural-address AI framing is a canonical entry in the concept page.
• related: Anthropic — Chris Olah's participation in the encyclical launch and reported Anthropic influence on the text.
• related: AI Labor Disruption — labor is explicitly invoked in the inaugural address and encyclical.
• related: Autonomous Weapons — Magnifica humanitas condemns lethal autonomous weapons and calls to "disarm" AI; declares just-war theory "outdated."
• related: AI Welfare / Model Welfare / Moral Patienthood — human-dignity framing implicates AI moral-status debates.
• related: AI Mental Health and Psychological Harm — pastoral-care dimension.
• related: AI Alignment — Catholic anthropology's non-reducibility claim is in tension with pure alignment-as-optimization framings.
• related: The Digitalist Papers (Stanford, Volumes 1–2) — Hamdy/Moore/Weyl essay argues religious constituencies are structurally underrepresented; Leo XIV's address is a counter-example of religious-civil-society engagement.

Sources

• Address of the Holy Father to the College of Cardinals (2025-05-10)