Pope Leo XIV Defines AI Ethics as a Second Industrial Revolution

Simon Willison

May 26, 2026 · Updated Jun 7, 2026

Pope Leo XIV released Magnifica Humanitas, the Catholic Church's first encyclical dedicated to the ethics and social impact of artificial intelligence. The document frames AI as a cultivated rather than built technology, warning that its lack of transparency requires strict human accountability for life-altering decisions.

Simon Willison, creator of Datasette, analyzed the Vatican's new encyclical, Magnifica Humanitas, which defines the Church's formal stance on AI. The document frames AI as a second industrial revolution, noting that systems are "cultivated" rather than explicitly built, leaving their internal computational processes largely unknown even to their own developers.

Document title: Magnifica Humanitas
Core framing: Second industrial revolution
Data status: Common or shared good
Accountability: Required at every stage
Environmental focus: Energy and water consumption

This moral intervention follows Chris Olah's Vatican AI safety analysis. The encyclical warns that delegating sensitive decisions—like credit or employment—to automated systems risks removing "compassion and mercy." It targets the "apparent objectivity" of models that reflect the cultural biases of their designers.

Willison highlights the Pope's proposal to treat data as a "common good" rather than private property, arguing that ownership should be regulated as a collective product. This shift, alongside concerns about the environmental cost of models, signals a growing pressure to move beyond technical safety toward broad social and economic accountability.

View the full update on simonwillison.net

Simon Willison

@simonwMay 26

When I woke up this morning I didn't think I'd be spending a bunch of time today getting familiar with Catholic theology, but here we are. Notes on Pope Leo XIV's encyclical on AI. https://t.co/VUN6bjVcEx

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