Antiqua et Nova, Explained

The basic facts

Full title: Antiqua et Nova: Note on the Relationship Between Artificial Intelligence and Human Intelligence

Released: January 28, 2025, the feast of St. Thomas Aquinas. The choice of date is deliberate: Aquinas is the patron of Catholic philosophical reflection on intellect and the soul, and the document draws heavily on his metaphysics.

Issued by: The Vatican's Dicastery for the Doctrine of the Faith (DDF) and the Dicastery for Culture and Education, jointly.

Signed by: Cardinal Víctor Manuel Fernández (Prefect of the DDF), Cardinal José Tolentino de Mendonça (Prefect of the Dicastery for Culture and Education), Monsignor Armando Matteo (Secretary, Doctrinal Section of the DDF), and Archbishop Paul Tighe (Secretary, Culture Section).

Approved by: Pope Francis, on January 14, 2025.

Length: 117 numbered paragraphs across six sections, roughly 30 pages in the English translation.

Type of document: A "doctrinal note." This is a specific genre in Catholic teaching documents. A note is more formal than a press release but less weighty than an encyclical or apostolic constitution. It carries the authority of the issuing dicasteries with papal approval, but does not invoke papal infallibility. In practice, it functions as authoritative guidance for Catholic teaching, formation, and pastoral practice.

What "Antiqua et Nova" means: Latin for "ancient and new." The phrase comes from the document's opening line, which alludes to Matthew 13:52: "every scribe who has become a disciple of the kingdom of heaven is like a head of a household, who brings out of his treasure things new and old." The title signals the document's method, which is to bring the Catholic Church's ancient philosophical and theological tradition into conversation with the new technological reality of AI.

Primary source link: Full English text on vatican.va.

Why this document matters

Antiqua et Nova is the first comprehensive Vatican doctrinal treatment of AI. Earlier Vatican statements on AI (in addresses by Pope Francis, the 2020 Rome Call for AI Ethics, occasional remarks) addressed pieces of the question. Antiqua et Nova addresses the whole.

Three things make it the foundational text:

First, it draws the metaphysical line. The document is unambiguous that AI and human intelligence are different in kind, not just degree. AI is "a product" of human intelligence, not "an artificial form" of it (Antiqua et Nova 35). This is the single most consequential philosophical claim in the document, and every subsequent Catholic teaching on AI rests on it.

Second, it covers every major domain. Education, work, healthcare, interpersonal relationships, art, warfare, the environment, and AI's relationship to religion itself. No prior Catholic document on AI is this comprehensive.

Third, it positions the Church as a serious interlocutor. The document is not reactive or fearful. It explicitly acknowledges AI's beneficial uses, engages with technical specifics (generative AI, machine learning, AGI), and offers a constructive moral framework. It is, in other words, a document that any thoughtful technologist, regardless of religious background, can read with profit.

Pope Leo XIV, elected three months after the document's release, has built his AI teaching directly on Antiqua et Nova's framework. See the compendium of his major statements.

The six-section structure

Antiqua et Nova is organized into six sections of unequal length:

1. Introduction (paragraphs 1-5). Establishes the document's purpose and method.
2. What is Artificial Intelligence? (paragraphs 6-15). Defines AI in technical terms and distinguishes it from human intelligence.
3. Intelligence in the Philosophical and Theological Tradition (paragraphs 16-35). The philosophical heart of the document. Defines human intelligence in Catholic terms and contrasts it with AI.
4. The Role of Ethics in Guiding the Development and Use of AI (paragraphs 36-55). General ethical framework.
5. Specific Questions (paragraphs 56-107). The longest section. Addresses AI in particular domains: relationships, economics, work, healthcare, education, fake news, privacy, the environment, warfare, and our relationship with God.
6. Conclusion (paragraphs 108-117). Final reflections and call to action.

The first half of the document (paragraphs 1-35) is foundational: it explains what AI is, what intelligence is, and how the two differ. The second half (paragraphs 36-117) applies those foundations to specific moral and pastoral questions. Most readers will find the second half more immediately practical, but the first half is what makes the second half work.

The core philosophical claim

If you read only one section of Antiqua et Nova, read paragraphs 16-35. This is where the document does its most important work.

The argument runs like this. Human intelligence, on the Catholic understanding, is not a separate faculty bolted onto a biological organism. It is the operation of a particular kind of being whose nature is to be a unity of body and soul. The intellect grasps truth, the will freely chooses the good, and both belong to the soul, by which the human person "shares in the light of the divine mind" (Antiqua et Nova 17, citing Gaudium et Spes 14-15). Human intelligence is also essentially relational: it is "exercised in relationships, finding its fullest expression in dialogue, collaboration, and solidarity" (Antiqua et Nova 18).

From this, the decisive distinction follows: AI "should not be seen as an artificial form of human intelligence but as a product of it" (Antiqua et Nova 35). AI is something humans make. Human intelligence is what humans are. The two are not on the same metaphysical map.

The document is careful to note that this distinction is not anti-technology. AI is a tool, and like any tool, it can be used well or badly. The point is that the word "intelligence" applied to AI is an analogy, not a literal description. Pope Francis is quoted in the document observing that "the very use of the word 'intelligence' in connection with AI can prove misleading" because it suggests AI sits on a spectrum with human intelligence rather than being a different kind of thing entirely (paragraph 10).

This is the foundation on which everything else in the document rests. The page Can AI Have a Soul? works through the philosophical implications in more depth.

The ethical framework

Paragraphs 36-55 develop the document's general ethical approach. The structure of the argument is recognizable to anyone familiar with Catholic social teaching: it begins with human dignity, derives implications for the common good, and ends with calls for justice and solidarity.

Four convictions structure the section:

AI itself is not a moral agent. AI systems are not capable of moral judgment (Antiqua et Nova 39). The moral responsibility for what AI does belongs to the humans who design it, deploy it, and use it. This rules out a particular kind of evasion: blaming the algorithm. There is no such moral category.

Decisions remain human. AI can support human decision-making, but it cannot substitute for it. "AI can be used to assist human decision-making, but only humans can actually make decisions" (paragraphs 43-48). This applies in particular to high-stakes domains like medicine, criminal justice, and warfare, where outsourcing decisions to algorithms is a category mistake about what algorithms are.

Regulatory accountability is essential. The document calls for legal frameworks that hold legal persons (companies, governments, developers) accountable for AI's consequences, with "appropriate safeguards for transparency, privacy, and accountability" (Antiqua et Nova 46).

Common good over private profit. AI's benefits should accrue to humanity broadly, not be concentrated in the hands of those who control the technology. This connects Antiqua et Nova to the Church's long tradition of social teaching, beginning with Leo XIII's Rerum Novarum (1891) on the First Industrial Revolution. The continuity is deliberate: see why Pope Leo XIV chose his name for the explicit parallel.

Specific domains

The longest section of Antiqua et Nova (paragraphs 56-107) addresses AI in particular spheres of human life. Below is a synthesis of each, with paragraph references for readers who want to go to the source.

AI in human relationships

The document's strongest moral language appears here. The deliberate use of AI to simulate human relationships, especially through "anthropomorphizing AI" to create the impression that a machine is a person, is called a "grave ethical violation" (paragraphs 60-62). This is targeted at companion apps, AI partners, and other technologies that present themselves as substitutes for human connection. The Vatican's concern is not that the technology is sophisticated; it is that the use is fraudulent. There is no person there to be in relationship with.

AI in the economy and work

The document acknowledges AI's productivity benefits but warns of distortions: "while AI promises to boost productivity, current approaches to the technology can paradoxically deskill workers, subject them to automated surveillance, and relegate them to rigid and repetitive tasks" (Antiqua et Nova 67). The Catholic understanding of work as participation in God's creative activity is at stake; deskilling and surveillance violate it. The document calls for protections against algorithmic exploitation of workers.

AI in healthcare

AI's beneficial uses in diagnosis, drug discovery, and clinical decision support are explicitly acknowledged. The concern is the human relationship between caregiver and patient. The Vatican worries that AI-mediated care could result in "worsening the loneliness that often accompanies illness," and stresses that medicine is not only a technical practice but a relational one (paragraphs 73-79).

AI in education

If used prudently, AI can improve access to education and offer immediate feedback (Antiqua et Nova 80). The danger is that "many programmes merely provide answers instead of prompting students to arrive at answers themselves or write text for themselves," which leads to a failure to develop critical thinking skills (paragraph 82). The document also warns about biased or fabricated information generated by AI and the resulting epistemological harm to students (paragraph 84).

AI and fake news

The document treats AI-generated disinformation as a grave concern (paragraphs 85-87). Beyond the obvious case of deliberately deceptive content, it warns that the routine use of generative AI without verification spreads inaccuracies that erode shared epistemic ground. Those who produce or share AI-generated content are called to "exercise diligence in verifying the truth of what they disseminate."

AI in warfare

The document is severe on autonomous lethal weapons systems. Weapons "capable of identifying and striking targets without direct human intervention are a cause for grave ethical concern" (Antiqua et Nova 100). The Vatican has called for such weapons to be banned, on grounds that they "pose an existential risk by having the potential to act in ways that could threaten the survival of entire regions or even of humanity itself" (paragraph 101). The document also warns of AI accelerating arms races more broadly (paragraph 99).

AI and our relationship with God

The final specific section, paragraphs 104-107, is perhaps the most theologically distinctive. The Vatican observes that as society drifts from connection with the transcendent, "some are tempted to turn to AI in search of meaning or fulfillment, longings that can only be truly satisfied in communion with God" (paragraph 104). The concern is not that AI will become divine, but that humans will treat it as such. The document calls this temptation a kind of idolatry: the worship of something we have made, as if it could give what only God can give.

This section is where the document earned the headline that ran in many outlets when it was released: "Vatican warns against AI as substitute for God."

The most important passages

For readers who want to go directly to the source, these are the paragraphs most worth reading first, in roughly priority order:

1. Paragraphs 17-18: Human intelligence as a unity of body and soul, exercised in relationships. The philosophical foundation.
2. Paragraph 35: AI as "a product" of human intelligence rather than "an artificial form" of it. The single most-quoted passage.
3. Paragraphs 39-48: The general ethical framework. Why AI is not a moral agent and why decisions remain human.
4. Paragraphs 60-62: The "grave ethical violation" of simulating human relationships with AI.
5. Paragraphs 67-72: AI in the economy and work, including the deskilling concern.
6. Paragraphs 99-103: AI in warfare, including the case for banning autonomous lethal weapons.
7. Paragraphs 104-107: AI as a substitute for God. The most theologically distinctive passages.

The full document is freely available on vatican.va in multiple languages.

What Antiqua et Nova does not say

Several common readings of the document are mistaken, and it is worth correcting them.

It does not condemn AI. The document repeatedly affirms AI's legitimate and beneficial uses. The criticism is targeted at specific misuses and at the philosophical confusion of AI with human intelligence, not at the technology itself.

It does not predict AI consciousness. The document does not address the question of whether AI could ever become conscious in some technical sense. Its argument is metaphysical, not empirical: it concerns what AI is, not what AI might one day do. Sophistication does not change kind.

It is not a regulation. The document is doctrinal guidance, not law. It influences how Catholics think about AI and how Catholic institutions deploy it, but it does not bind secular legal systems. Where it calls for regulation (in warfare, in labor protections, in algorithmic accountability), it is making moral arguments for legislators to consider, not issuing legal commands.

It is not the final Catholic word on AI. Antiqua et Nova opens a conversation rather than closing it. Pope Leo XIV's papacy will produce significant further teaching on AI, including his first encyclical (signed May 15, 2026; see the tracking page). The doctrinal note is the foundation, not the whole structure.

How Antiqua et Nova fits into the larger Catholic conversation on AI

Antiqua et Nova sits at the center of a small but growing body of Catholic teaching on AI. Some context for where it came from and where it leads:

Before Antiqua et Nova: Pope Francis addressed AI repeatedly throughout his papacy, including in his keynote address to the G7 summit in June 2024 (the first time a pope addressed a G7 meeting), in his October 2024 encyclical Dilexit Nos, and in his 2024 World Communications Day message. The 2020 Rome Call for AI Ethics, a non-doctrinal statement signed by tech companies and the Pontifical Academy for Life, provided some of the practical groundwork.

After Antiqua et Nova: Pope Francis died on April 21, 2025, three months after the document's release. His successor, Pope Leo XIV, has made AI the defining theme of his papacy, drawing explicit parallels to Pope Leo XIII's response to the First Industrial Revolution. The first encyclical of Leo XIV's papacy, focused on AI, was signed on May 15, 2026. See the compendium of Pope Leo XIV's major statements on AI.

The trajectory is clear. Antiqua et Nova established the framework. Pope Leo XIV is building the magisterium that flows from it.