Pope Leo XIV Calls for AI to Be 'Disarmed' and Urges a Ban on Lethal Autonomous Weapons
Pope Leo XIV has said AI systems should be "disarmed," and he has encouraged United Nations member states to "take concrete steps toward banning lethal autonomous weapons" at their meeting in Geneva next month. The remarks were reported by The Verge on October 30, 2026.
The pontiff said humans "have the responsibility to guide, change and, when necessary, reject" AI applications. He said decisions affecting human life, freedom, and the use of force must always remain subject to effective, informed, and responsible human oversight. He also called for shared standards, independent oversight and clear mechanisms of accountability for the development and use of AI.
On the question of status, Pope Leo XIV said "Machines are tools, not persons." He warned about the dangers of granting AI systems rights or legal personhood, meaning recognition as a legal subject that can hold rights and duties.
The position builds on earlier statements from the Holy See. In 2024, Pope Francis called for a ban on autonomous weapons, saying "No machine should ever choose to take the life of a human being." Pope Leo XIV's first Encyclical Letter, Magnifica Humanitas, addresses a new technological challenge, and in it he stated that disinformation finds a powerful amplifier in AI. An encyclical is a formal teaching letter issued by the pope.
Vatican materials published on September 26, 2026 quoted the pope identifying peace, justice, and truth as three essential words that must guide diplomacy. Earlier, in May, Reuters reported that he said any use of AI in warfare must be subject to the most rigorous ethical constraints.
The papal appeal lands in an active multilateral track. In late August, the UN Secretary-General and the International Committee of the Red Cross renewed their call for rules on lethal autonomous weapons, systems that select and engage targets without a human choosing each strike. A meeting under the Convention on Certain Conventional Weapons, a UN treaty that restricts certain types of weapons, was due to take place in Geneva in November. The Group of Governmental Experts on Lethal Autonomous Weapons Systems held its First and Second Sessions in 2026. The pope's request that states take concrete steps toward a ban is directed at that same process.
The distinction at the centre of the pope's remarks will be familiar to engineers and policy staff. Calling a system a tool places responsibility on the people who design, train, deploy and authorise it, and the call for independent oversight and defined accountability follows from that premise. The harder questions lie in implementation: how a human decision-maker is made "effective" and "informed" inside a targeting or threat-response loop operating at machine speed, and who answers when that loop fails.
In my view, the most useful reading of the statement is as a set of requirements rather than a finished policy. It names the properties a governance regime would need to have, including human authority over lethal force, traceable accountability and independent review, without specifying the technical or legal mechanisms that would deliver them. Those mechanisms are what the Geneva discussions will have to produce, and it is there that a durable framework, if one emerges, will be judged.
The broader context here is that the same principles of human oversight and clear responsibility also apply to civilian deployments, from clinical decision support to automated credit and hiring systems. Insisting that machines remain tools is a way of keeping those systems answerable to people, and that answerability is a condition for them to deliver the gains their builders promise.
