Pope's AI Encyclical Addresses Autonomous Weapons and Just War

Religious authority confronts military AI

Pope Leo XIV has issued his first encyclical addressing artificial intelligence's impact on warfare and human dignity, according to Foreign Policy. The document, titled Magnifica Humanitas: On Safeguarding the Human Person in the Time of Artificial Intelligence, examines both AI's potential benefits and its threats to fundamental human rights as military forces worldwide develop increasingly autonomous weapons systems.

The papal intervention comes as armed forces accelerate deployment of AI-enabled platforms that require less human oversight. A scene from the Ukraine conflict illustrates the trend: this spring, a priest near Zaporizhzhia blessed a Gara strike drone before its mission against Russian positions. That particular system still required a human operator, but many weapons under development by advanced militaries do not.

Why it matters

The encyclical represents a significant effort by a major moral authority to establish ethical boundaries for military AI before deployment outpaces governance. As autonomous systems proliferate, the traditional just war framework—developed over centuries to constrain violence—faces its most fundamental challenge. Without human judgment in targeting decisions, wars risk becoming easier to initiate and harder to control, potentially undermining principles of proportionality and discrimination that have governed armed conflict.

The autonomy challenge

Military AI systems increasingly displace human decision-making in combat operations. Advanced nations are developing weapons that can identify, track, and engage targets with minimal or no human intervention. This shift raises questions about accountability, proportionality, and the moral weight of lethal decisions.

Traditional just war theory, rooted in centuries of theological and philosophical development, assumes human actors make consequential choices about violence. Autonomous systems complicate that framework by removing humans from the decision loop at critical moments.

Adapting moral frameworks

The pope's encyclical attempts to extend established ethical principles into an era where machines execute lethal force. The document addresses how AI threatens human dignity while acknowledging the technology's constructive applications. This balancing act reflects broader debates among ethicists, military planners, and policymakers about governing emerging weapons.

The challenge extends beyond religious institutions. Military strategists, international lawyers, and human rights advocates are grappling with how to apply existing laws of armed conflict to systems that operate at speeds and scales beyond human comprehension. Questions about meaningful human control, algorithmic bias in targeting, and responsibility for autonomous weapons failures remain unresolved.

Foreign Policy first reported these details in an article by Anthony Pfaff, director of the Strategic Research and Assessment Department at the U.S. Army War College, and Patrick Granfield, a former strategic communications official.