Magnifica
Humanitas

Pope Leo XIV released the Catholic Church’s first encyclical dedicated entirely to artificial intelligence on May 25, 2026. Titled Magnifica Humanitas (“Magnificent Humanity”), the 83-page document is the most significant formal teaching on AI from any major religious institution to date.

The Long Tradition of Reading the Signs of the Times

The Catholic Church has, for more than a century, treated major technological and economic transformations not as neutral developments but as moral events requiring a response from the whole body of the faithful. The pattern begins in earnest with Rerum Novarum (1891), Pope Leo XIII’s landmark encyclical on the condition of labor. Written amid the upheavals of the Industrial Revolution—mass migration to cities, the collapse of traditional guilds, the concentration of productive power in the hands of a few, and the emergence of both laissez-faire capitalism and revolutionary socialism—Rerum Novarum established the Church’s right and duty to speak on the “social question.” It defended the dignity of the worker, the right to a just wage, the legitimacy of unions, and the social function of property while rejecting both socialism’s abolition of private property and the idea that labor is merely a commodity. (Rerum Novarum, Vatican.va)

Forty years later, in Quadragesimo Anno (1931), Pius XI returned to the same questions during the Great Depression. He introduced the principle of subsidiarity—higher authorities should not absorb functions that smaller communities or individuals can perform—and warned against the “economic dictatorship” that can arise when capital becomes excessively concentrated. Technology, in his analysis, had multiplied productive capacity yet also created new forms of vulnerability and new concentrations of power. (Quadragesimo Anno, Vatican.va)

The tradition deepened at the Second Vatican Council. Gaudium et Spes (1965), the Pastoral Constitution on the Church in the Modern World, marked a decisive shift from primarily defensive responses toward a more dialogical engagement with modernity. It described the “profound and rapid changes” sweeping the world—driven by science, technology, and new means of communication—and insisted that the Church must read these “signs of the times” in light of the Gospel. Technology was affirmed as a participation in God’s creative work, yet the document warned of the persistent risk that material progress would outrun moral and spiritual wisdom. (Gaudium et Spes, Vatican.va)

Later popes continued the pattern. John Paul II’s Laborem Exercens (1981) and Centesimus Annus (1991) addressed technology’s transformation of work and the emergence of a new “knowledge economy.” Benedict XVI, in Caritas in Veritate (2009), critiqued the “technocratic ideology” that entrusts all development to technical solutions without moral direction. Pope Francis, in Laudato Si’ (2015), mounted the strongest critique yet of the “technocratic paradigm,” in which technology and unchecked power treat both nature and human beings as objects to be dominated. (Laudato Si’, Vatican.va)

Francis’s engagement with artificial intelligence itself was already substantial before any encyclical. His 2024 World Day of Peace Message, “Artificial Intelligence and Peace,” his historic address to the G7 in Puglia that same year, and the 2025 doctrinal note Antiqua et Nova together constitute the most developed body of papal teaching on AI prior to Magnifica Humanitas. He repeatedly stressed the need for “algor-ethics,” human oversight, the protection of human dignity against reduction to data, and binding international agreements—especially on lethal autonomous weapons. (Message for the 57th World Day of Peace, 2024; G7 Address, June 2024, Vatican.va)

It is against this long arc that Pope Leo XIV’s choice of name and the issuance of a full encyclical devoted solely to artificial intelligence must be read. By taking the name Leo XIV, he explicitly invoked the precedent of Leo XIII’s response to the Industrial Revolution. The signal is clear: AI is not one technology among others. It is a civilizational threshold comparable in scale to mechanized industry.

The Nature and Weight of an Encyclical

Encyclicals are among the most solemn forms of papal teaching. Addressed to the bishops of the world and, through them, to the entire Catholic faithful, they carry significant moral and intellectual authority even for those outside the Church. They are not occasional interventions; they are meant to shape the conscience of the faithful and to offer guidance to the wider world over time. Magnifica Humanitas is the first encyclical in history to take artificial intelligence as its central and sustained subject.

The Core Argument

The encyclical does not focus primarily on technical details. Instead, it frames AI as a question of power. Pope Leo XIV argues that frontier AI labs now control more data and computational resources than many nation-states. This concentration, he writes, risks creating new forms of dependency and eroding human agency. The document explicitly calls for external regulation rather than leaving governance to the companies building the technology. It warns against the development of autonomous weapons systems that could operate “beyond any human reach to govern them effectively” and urges that AI be developed in service of the common good rather than commercial or geopolitical dominance.

Engagement with Builders

One of the more notable aspects of the encyclical’s release was the degree to which it sought dialogue with those actually building frontier systems. Christopher Olah, co-founder of Anthropic, participated in the Vatican events surrounding the document. Olah has been unusually open, among leading AI researchers, about internal observations of model behavior that resemble human-like states such as joy, fear, and unease. His presence at the Vatican underscored the encyclical’s attempt to speak not only to regulators and the faithful but to the technical community itself—continuing a recent Vatican pattern seen in the Rome Call for AI Ethics and the interfaith commitments it has generated.

In this sense Magnifica Humanitas stands in clear continuity with the tradition it extends. From Leo XIII’s engagement with the social consequences of the steam engine and the factory to Francis’s confrontation with the technocratic paradigm, the Church has consistently refused to treat technology as morally neutral. Each new “sign of the times” has been met with an insistence that power—especially new forms of power—must remain tethered to the dignity of the human person and the requirements of the common good.