The Vatican announced on 18 May that Pope Leo XIV will present his first encyclical letter — Magnifica Humanitas — on 25 May at the Synod Hall in Vatican City. The document, centred on 'the protection of the human person in the age of artificial intelligence', represents the Catholic Church's most significant formal statement on AI and places the technology squarely within the tradition of Catholic social teaching on labour, justice, and human dignity.
The choice of speakers for the formal presentation is striking. Christopher Olah, co-founder of Anthropic and head of the company's research on AI interpretability — the field dedicated to understanding what happens inside neural networks — will be among the lay presenters. Olah's work on mechanistic interpretability has been instrumental in developing techniques to peer inside large language models and understand how they represent concepts, make decisions, and sometimes produce harmful outputs. His presence at the Vatican signals that the encyclical engages seriously with the technical realities of AI systems rather than offering purely philosophical commentary.
The presentation will be led by Cardinal Víctor Manuel Fernández, head of the Dicastery for the Doctrine of the Faith, and Cardinal Michael Czerny, who leads the Dicastery for Promoting Integral Human Development. Theologians Anna Rowlands and Leocadie Lushombo will also speak, providing perspectives on social justice and development.
The timing is deliberately symbolic. Pope Leo XIV signed Magnifica Humanitas on 15 May — exactly 135 years to the day after his namesake Pope Leo XIII signed Rerum Novarum ('Of New Things') in 1891. That encyclical, written in response to the Industrial Revolution's disruption of labour and social structures, established the foundation of modern Catholic social teaching. By choosing this anniversary, Leo XIV is explicitly framing artificial intelligence as a transformation of comparable magnitude to industrialisation — one that demands the same level of moral and institutional response.
For context engineers, the encyclical's engagement with Anthropic's interpretability research is particularly noteworthy. Olah's work represents the technical frontier of understanding AI systems from the inside — the same systems that context engineers work with daily. The Vatican's decision to ground its moral framework in this technical research, rather than treating AI as an abstract threat, suggests a more sophisticated institutional engagement with the technology than previous Vatican statements on digital ethics.
