Pope Leo XIV Releases Historic First Encyclical on Artificial Intelligence

Pope Leo XIV has released his first encyclical — a formal letter of papal teaching — under the title Magnifica Humanitas (Magnificent Humanity), making him the first pope in history to dedicate a foundational policy document entirely to the subject of artificial intelligence.

The roughly 100-page document was dated May 15, deliberately timed to fall exactly 135 years after his namesake, Pope Leo XIII, published Rerum Novarum — the landmark 19th-century encyclical that laid the groundwork for Catholic social teaching on labor and the effects of industrialization. The new pope draws a direct parallel between that industrial transformation and today's AI revolution.

A First for the Presentation of a Papal Document

The release event itself broke with precedent. The pope was personally present for the unveiling — a first for the presentation of a papal encyclical — joined by cardinals, theologians, and notably, Chris Olah, co-founder of AI safety company Anthropic. The inclusion of a prominent AI researcher at such an event underscores the document's intent to engage seriously with technical realities rather than offer only abstract moral guidance.

Anthropic has drawn significant attention in recent months for refusing to make its AI models available for use in automated weapons systems or population surveillance programs — a stance that has put the San Francisco-based company in direct conflict with the current US administration. President Donald Trump has publicly criticized both Anthropic and Pope Leo XIV.

Key Themes: Autonomous Weapons and Life-or-Death Decisions

While the full contents of the encyclical were kept under strict embargo until release, leaks and commentary in the lead-up to the publication pointed to two central concerns.

The first is autonomous weapons — the question of whether AI-backed systems should be permitted to make lethal decisions in conflict without direct human authorization. The encyclical is expected to take a firm position that delegating life-and-death decisions to machines represents a fundamental abdication of moral responsibility.

The second theme is the broader social and economic displacement triggered by rapid AI adoption — an echo of the concerns Leo XIII raised about industrial capitalism's effects on workers and the poor.

Continuity with Catholic Social Teaching

First encyclicals are closely watched because they are understood to set the theological and policy tone for an entire papacy. By centering his first on AI, Leo XIV is signaling that the moral and social dimensions of intelligent machines will be a defining concern of his pontificate.

The parallels to Rerum Novarum are deliberate: that 1891 document emerged when industrial machinery was displacing human labor at scale and concentrating economic power in ways that left workers vulnerable. Leo XIV appears to be positioning Magnifica Humanitas as a similar moral intervention — one addressed to a world in which AI systems are increasingly capable of doing what was previously considered exclusively human work, including making decisions that affect human life, liberty, and dignity.

The encyclical arrives as governments, corporations, and international bodies are actively debating AI regulation frameworks, autonomous weapons treaties, and the ethics of large-scale surveillance — making its timing as strategically significant as its content.