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On May 15, 2026 — the 135th anniversary of “Rerum Novarum” — Pope Leo XIV signed his first encyclical, “Magnifica Humanitas.” The date was deliberate.

Amid the rapid expansion of artificial intelligence and digital media, Pope Leo XIV is calling on families, schools and policymakers to forge an “educational alliance for the digital age” to protect the dignity and intellectual development of young people.

In his first encyclical, Pope Leo XIV used a sweeping reflection on artificial intelligence to question whether the Catholic Church’s centuries-old just war framework remains valid in modern warfare and to ask pardon for the church’s role in slavery.

Presenting the first encyclical of his pontificate, Pope Leo XIV warned that artificial intelligence must be “disarmed,” urging governments, tech leaders and society to confront the rapidly growing technology before it weakens human relationships, critical thinking and peace itself.

Pope Leo XIV called for vigilance as he spoke at the Vatican press conference May 25 to present his first encyclical on artificial intelligence, saying his conversations with industry leaders — including “very troubling voices” who warned of autonomous weapons systems beyond effective human governance — had led him to the conviction that AI “needs to be disarmed.”

Just as it did in the industrial age, the Catholic Church is called to discern the rapidly evolving advances of digital technology in the light of the Gospel, said Cardinal Pietro Parolin, Vatican secretary of state.