“Released to theologians, AI researchers, and heads of state simultaneously, Magnifica Humanitas argues that artificial intelligence is neither tool nor threat but a mirror in which humanity must choose what it wants to see. The reception has been extraordinary and polarising in equal measure.”
Pope Leo XIV, the American-born pontiff elected in May 2025 following the death of Pope Francis, has spent his first year in office moving with a deliberateness that has surprised both admirers and sceptics. His first encyclical was expected to address climate change, or poverty, or the ongoing fragmentation of the global order. Instead, released on 25 May and formally presented yesterday at a ceremony in the Vatican’s Synod Hall attended by AI researchers, ethicists, and representatives of every major technology company operating in Europe, it addresses something that no pope has ever directly confronted: the nature, the power, and the moral responsibility of artificial intelligence. The document, titled Magnifica Humanitas, or The Magnificence of Humanity, is 147 pages long, draws on Aquinas and Teilhard de Chardin in equal measure, and is already being described as one of the most significant papal documents of the twenty-first century.
The document’s central argument is neither technophobic nor naively optimistic. Leo does not argue that AI is evil, nor does he celebrate it as a tool of human flourishing without qualification. He argues, at length and with considerable philosophical precision, that artificial intelligence is a mirror: a technology that reflects, at scale and with unprecedented speed, the values, biases, and moral choices of the humans who design and deploy it. The question it forces upon humanity is not ‘what can AI do?’ but ‘what do we want to become?’ The encyclical argues that answering that question requires a moral framework rooted not in market incentives or geopolitical competition, but in an understanding of human dignity that transcends both.
Three themes dominate the document. The first is what Leo calls ‘the dignity of the unreplaceable’: an extended argument that human beings possess a form of dignity, rooted in their capacity for love, suffering, creativity, and moral choice, that no machine can replicate. The second theme is algorithmic justice: the document is remarkably specific about the ways in which AI systems trained on biased data perpetuate and amplify discrimination, and calls on governments to regulate the deployment of AI in criminal justice, healthcare, and employment with rigour. The third, and most contested, theme is what Leo calls ‘the obligation of restraint,’ his argument that there are domains where human beings should deliberately choose not to deploy AI, because the cost of doing so is paid in human meaning and connection that cannot be priced or recovered.
“We have built a mirror of extraordinary power and placed it at the centre of our civilisation. The question Magnifica Humanitas asks is deceptively simple: do we like what we see?”
The reception in the technology industry has been varied and, in places, surprisingly engaged. Several senior figures at major AI laboratories have publicly welcomed the encyclical, including one who described it as ‘the most rigorous ethical framework for AI development published this year, from any source.’ Others have pushed back on the ‘obligation of restraint’ section, arguing that Leo’s framework would, if translated into policy, prohibit applications that could save millions of lives in medicine and climate science. The Anthropic chief executive described the document as ‘a serious contribution to a conversation the industry needs to be having more openly.’
What makes Magnifica Humanitas remarkable as a public document is its intended audience. Unlike many papal encyclicals, which are addressed primarily to the Catholic faithful and read mainly by theologians and clergy, Leo XIV explicitly addresses this document to ‘all people of good will, regardless of faith or the absence of it.’ The presentation ceremony in the Synod Hall included Buddhist monks, Muslim scholars, Hindu philosophers, and secular ethicists sitting alongside cardinals and bishops. In Seoul, Jakarta, and Nairobi, where the Catholic Church is growing fastest, the document is being read and debated with an intensity that suggests it has found its audience.
