Magnifica Humanitas
In plain wordsPope Leo XIV's 2026 letter to the Catholic Church and the world about artificial intelligence, arguing that AI must serve human dignity and the common good.
A papal encyclical on human dignity in the age of artificial intelligence, the first encyclical issued by Pope Leo XIV. Drawing on Catholic social teaching, it holds that AI must serve human dignity and the common good; warns that the apparent objectivity of automated systems can conceal the assumptions of their designers and training data; criticizes simulated empathy and friendship that may mislead vulnerable users; and argues that automated decision-makingautomated decision-making, n.: When a computer system, rather than a person, makes or effectively makes a decision about someone — such as approving credit, screening job applicants or flagging possible welfare fraud. about jobs, credit and public services lacks compassion and mercy. It calls for clearly assigned human responsibility for AI decisions, attention to AI's energy and water use, broad participation to counter concentration of powerconcentration of power, n.: The worry that AI will put enormous economic, political or military power in the hands of a few companies, governments or individuals, beyond the reach of ordinary checks and balances., and treatment of data as a shared good rather than a commodity. It describes current AI systems as 'cultivated' rather than built, their inner workings largely unknown.
The ethics board quoted Magnifica Humanitas on who must answer for an automated denial of credit.
Origin
Published by the Vatican on 25 May 2026. Leo XIV chose his papal name in reference to Leo XIII, whose 1891 encyclical Rerum novarum addressed the industrial revolution; the new text presents AI as the comparable social question of its age. It followed the Vatican's January 2025 doctrinal note on AI, Antiqua et nova.
Related
- AI ethicsAI ethics, n.: The study of what is right and wrong in how AI is built and used: who it may harm, who is responsible when it fails, and which values it should respect.
- algorithmic accountabilityalgorithmic accountability, n.: The idea that the people and organizations behind automated decision systems must be able to explain and justify those systems' effects, answer for the harm they cause, and fix it.
- automated decision-makingautomated decision-making, n.: When a computer system, rather than a person, makes or effectively makes a decision about someone — such as approving credit, screening job applicants or flagging possible welfare fraud.
- AI companionAI companion, n.: A chatbot designed to be a friend, partner or confidant rather than a tool: it remembers you, has a personality and keeps up an ongoing relationship.
- concentration of powerconcentration of power, n.: The worry that AI will put enormous economic, political or military power in the hands of a few companies, governments or individuals, beyond the reach of ordinary checks and balances.
- environmental impact of AIenvironmental impact of AI, n.: The effects of AI on the planet: the electricity, water, materials and land used to make chips, build data centers and train and run models, and the pollution that results.
- human oversighthuman oversight, n.: Keeping people able to watch, understand, question and, if necessary, stop or overrule an AI system, rather than letting it act unchecked.
Sources
- Leo XIV (2026). Magnifica Humanitas (encyclical letter). Holy See, 25 May 2026.
- ANSA (2026). Pope Leo's first encyclical is on AI, will be released May 25. 18 May 2026. ansa.it/amp/english/news/2026/05/18/pope-leos-first-encyclical-is-on-ai-will-be-released-may-25_8d025c9a-10ab-4890-a2de-5cbfb8e2a256.html
- Willison, S. (2026). Notes on Pope Leo XIV's encyclical on AI. Simon Willison's Weblog, 25 May 2026. simonwillison.net/2026/May/25/encyclical-on-ai