Persons, Not Products: What Pope Leo XIV and the Ancient Church Can Teach Us About Artificial Intelligence
The newest papal encyclical and the oldest Christian theologians turn out to be reading from the same page.
Something is striking about watching the Catholic Church respond to artificial intelligence. While many respond with either uncritical enthusiasm for new technology or anxious warnings about its pitfalls, Pope Leo XIV’s encyclical Magnifica Humanitas (”On the Safeguarding of the Human Person in the Time of Artificial Intelligence”) offers a different approach: it insists that our fundamental response must center on the enduring and irreducible dignity of the human person—a perspective deeply rooted in the insights of the early Church Fathers.
Leo XIV’s argument is fundamentally anthropological: it’s a claim about what human beings are, and what no machine can reduce them to. This argument, reminiscent of Basil the Great, Gregory of Nazianzus, and Gregory of Nyssa in fourth-century Cappadocia, carries significant policy implications without being merely a policy statement.
The Cappadocians, Briefly
The Cappadocian Fathers are not household names outside of seminaries and theology departments, but they are among the most consequential thinkers in Christian history. Working in the aftermath of the Arian controversy, Basil the Great, his brother Gregory of Nyssa, and their friend Gregory of Nazianzus gave the Church the conceptual vocabulary it still uses to talk about the Trinity: one divine nature, three persons, each distinct without being separate, each in eternal communion without collapsing into uniformity.
Less often recognized is that this Trinitarian theology shaped the Cappadocians’ view of human persons. If God is a communion of distinct persons and humans are made in that image, personhood isn’t an isolated property. It’s relational; you exist in relation to God and neighbor. Distinction means communion, not isolation.
Gregory of Nyssa took this further. He argued humans bear an image of the divine, granting absolute and irreducible worth—not based on productivity, status, intelligence, or usefulness, but as part of their essence. Flattening a person into a function violates personhood. This is why Gregory so strongly opposed slavery: not just on humanitarian but on theological grounds. To own a person is to misunderstand personhood.
What Leo XIV Is Worried About
Magnifica Humanitas opens in that same register. The encyclical’s central anxiety is not that AI will become conscious, or that robots will take jobs (though it addresses the latter). The deeper worry is subtler and more philosophical: that in an age of artificial intelligence, we will begin to think about human beings the way we think about data.
Describing a person as a “user,” “consumer,” “demographic,” or “worker unit” is more than just shorthand. It introduces a logic of optimization and systems where it doesn’t belong. The encyclical warns that this thinking can infiltrate decisions in education, labor, healthcare, criminal justice, and politics, using frameworks incapable of grasping essential aspects of human beings.
Leo XIV reaches for the image of Babel — not to condemn technology itself, but to name a specific temptation: the desire to achieve unity through standardization, to replace the messiness of genuine communion with the efficiency of uniformity. True community, the encyclical insists, is not a smoothed-out aggregate of individual data points. It is a living fabric of distinct persons in relationship, built on trust, truth, and mutual responsibility.
Where the Two Converge
The parallels between Magnifica Humanitas and the Cappadocian inheritance are not merely similar—they reveal shared conclusions across centuries. Both address what it means to be human when confronted by powerful systems: the Church now reflects on A. At the same time,e the Cappadocians faced theological disputes that threatened to reduce persons to abstract categories. Both resist those reductions, underlining the same foundational insights about personhood.
On human dignity, both the Cappadocians and Magnifica Humanitas stress that worth is intrinsic—not based on achievements or utility. Gregory of Nyssa roots this in the divine image, affirming that personhood transcends function. Leo XIV echoes this by arguing that no algorithm can reduce personhood to what is produced or consumed, thereby connecting the ancient theological principle to modern contexts.
On communion over uniformity, the Cappadocians’ insight that distinction exists for the sake of true communion invites a direct comparison with Leo XIV’s warning against the Babel-like impulse to standardize. Both highlight that genuine relationships—rather than efficient sameness—form the foundation of a healthy human community, whether in ancient theology or contemporary technology.
On freedom and moral agency, the Cappadocians reject reducing humans to passive objects in deterministic systems, asserting that people choose their orientation toward God. Similarly, Magnifica Humanitas disputes technological determinism, stressing that the use of technology always reflects human moral choices. Both critiques oppose any system—ancient or modern—that diminishes active moral agency.
The deepest convergence may be on limits and creatureliness. Techno-optimism often seeks to engineer away limitations like disease, death, and vulnerability. The Cappadocians recognized this as a form of self-deification—trying to transcend through power rather than grace. Magnifica Humanitas echoes this: human weakness and dependence aren’t flaws to be fixed, but core aspects of creaturely life in which grace operates.
On truth as a shared good, both sources reject reducing it to a technical or competitive matter. For the Cappadocians, theology is pastoral: doctrine exists to form people in holiness and justice, not to win arguments. For Leo XIV, truth underwrites democracy, education, and the common good — it is a shared inheritance, not a commodity.
So What?
The practical import of all this is not that we should ban AI or retreat into a pre-technological pastoral idyll. Neither Leo XIV nor the Cappadocian Fathers counsel fear. What they counsel is discernment — the disciplined practice of asking, in every situation: does this serve? The takeaway isn’t to ban AI or retreat into a pre-technological idyll. Neither Leo XIV nor the Cappadocians counsel fear. Instead, they advocate discernment: continually asking whether something serves the full dignity of the human person or reduces them to less. It also has to be asked about ourselves — about the habits of mind we are forming when we reach for a chatbot before we reach for a conversation, when we optimize our relationships rather than investing in them, when we mistake efficiency for flourishing.
The Church’s answer to AI is not a policy paper, though policy matters. It is something older and stranger: a claim that the human person is made in the image of a God who is eternally, irreducibly, joyfully relational — and that no machine, however sophisticated, can either replicate or replace that.
Persons, not products. That is the tradition. That is the encyclical. And it turns out that is still the most radical thing anyone can say.
This post draws on Pope Leo XIV’s encyclical Magnifica Humanitas and the theological legacy of the Cappadocian Fathers: Basil the Great, Gregory of Nazianzus, and Gregory of Nyssa.