Until Magnifica Humanitas, no pope had ever addressed artificial intelligence at this length or with this level of technical and theological detail. Here are six things Leo XIV wants every Catholic to understand.
1. AI is not human intelligence, and the difference is everything
Leo XIV is precise on this point. Paragraph 99 states that AI systems “do not undergo experiences, do not possess a body, do not feel joy or pain, do not mature through relationships and do not know from within what love, work, friendship or responsibility mean.” They may imitate language and simulate empathy, but “they do not understand what they produce.” This is not a minor technical distinction. It is the foundation of everything that follows.
2. AI is never morally neutral
Every system embeds choices. Paragraph 104 states that “every technical tool embodies choices and priorities through what it measures, ignores and optimizes, and how it classifies people and situations.” When a system is designed in ways that treat some lives as less worthy, Leo XIV writes, it “has already introduced criteria that contradict the inalienable dignity of the human person.” Ethics cannot be an afterthought added once the technology is built.
3. Handing decisions to algorithms means losing accountability
When automated systems make consequential decisions—about employment, credit, access to services—paragraph 103 warns that “the exclusion of the vulnerable becomes cloaked in a veneer of neutrality and objectivity, against which it becomes difficult to raise objections.” Compassion, mercy, and forgiveness, the Pope writes, “gradually disappear from view.” Someone must always be answerable. An algorithm cannot be.
4. Data is a common good
This may be the encyclical’s most economically radical claim. Paragraph 108 insists that data “is the product of many contributors and should not be treated as something to be sold off or entrusted to a select few.” Algorithms, digital platforms, patents, and technological infrastructure all fall under the principle of the universal destination of goods. What the tech industry treats as private property, the Pope treats as belonging, in an important sense, to humanity.
5. The hidden workers must be seen
Behind every AI response, Leo XIV reminds us, lies “a long chain of mediation.” Paragraph 173 states that much of it depends on “millions of people engaged in essential yet largely unseen activities, such as data labeling, model training and content moderation, often involving disturbing material.” Many are young women working for minimal wages. Others extract rare earth minerals in dangerous conditions. “The bodies of these people are scarred, injured and worn down so that computational flow may continue uninterruptedly.” No celebration of AI’s benefits can ignore this.
6. AI must be disarmed, not just regulated
The encyclical’s most striking demand goes beyond governance frameworks and ethical guidelines. Paragraph 110 calls for AI to be “disarmed” — freed from “the mentality of armed competition,” from monopolistic control, from the race for geopolitical and commercial dominance. “To disarm does not mean rejecting technology, but preventing it from dominating humanity.” Paragraph 111 addresses AI developers directly: “Every design choice reflects a vision of humanity.” That responsibility, he insists, is both ethical and spiritual.
