On 14 July 2026, over 200 Nobel Prize winners, former heads of state, university representatives, and experts gathered among the pine trees and olive groves of the papal gardens in Castel Gandolfo to reflect on some of the greatest challenges facing our world: artificial intelligence and nuclear war.
It was the first day of the Global Nobel Laureates Assembly on Artificial Intelligence and Nuclear War, running until 16 July and inspired by Pope Leo XIV's encyclical Magnifica Humanitas, on safeguarding the human person in the time of artificial intelligence.
The Assembly - organized by the Domus Communis Foundation, whose President, Cardinal Silvano Maria Tomasi, took part - culminated in the signing of the Rome Declaration on an Unarmed and Disarming Peace in the age of artificial intelligence, nuclear and autonomous weapons. It set out guiding principles for the governance of AI focused on cooperation, human dignity, integral development, and peace.
Shared Principles for a Fragile Moment
"We gather at a moment in history marked by increasingly profound geopolitical tensions, the fragmentation of the international order, and intensifying technological competition," said Cardinal Fabio Baggio in his introductory remarks, underlining the importance of promoting dialogue across different fields. "At a time when the pace of innovation often exceeds that of reflection, the world stands in need of shared principles capable of guiding progress toward authentically human ends."
"This Assembly is not gathered simply to analyse risks," emphasized Cardinal Silvano Maria Tomasi, President of Domus Communis Foundation. "It is gathered to renew hope, to demonstrate that dialogue remains possible, that wisdom can still accompany knowledge, that humanity has not lost the capacity to govern its own future."
"May future generations be able to say that, at a moment when humanity possessed unprecedented power over its own destiny, women and men of conscience chose cooperation over confrontation, dialogue over fear, and hope over resignation," he added.
The Need to Govern AI
The opening session centered on the theme "Magnifica Humanitas for the Future of Our Common Home," beginning with an address by Cardinal Ángel Fernández Artime, who gave an overview of Pope Leo XIV's encyclical.
Juan Manuel Santos, Nobel Peace Prize laureate and former president of Colombia, welcomed the encyclical's call to disarm AI, noting that "it is only by acting in a similar spirit that we can hope to tackle all existential threats facing humanity." He warned that "without effective governance, it will be difficult, impossible, to ensure that AI becomes a force for good guided by human dignity, responsibility, accountability and rule of law."
Professor Muhammad Yunus, Nobel Peace Prize winner and Emeritus Chief Adviser of Bangladesh, reflected on how we are living through the end of one civilization and the beginning of the next, stressing the importance of involving young people in shaping the future of the world.
Other speakers in the opening session included Dr. Agnès Callamard, Secretary General of Amnesty International; Dr. Amir Banifatemi, Founder and Board Member of the International Association for Safe and Ethical AI; Professor James Muller, Co-founder of International Physicians for the Prevention of Nuclear War; Professor Karen Hallberg, Secretary General of Pugwash Conferences; and Professor David Gross, Nobel Prize in Physics.
A Three-Day Dialogue
Discussion sessions addressed themes including "The fragility of the human family in the nuclear age," "Technology in the service of humanity," and "The moral challenges of AI and War," as well as what happens when AI escapes human control.
The rest of the day featured addresses by Maria Ressa, Nobel Peace Prize laureate and Co-founder and CEO of Rappler, alongside AI researchers from Anthropic and DeepMind, offering different perspectives on the topics.
The first two days of the Assembly were held at the Borgo Laudato Si' in the papal gardens of Castel Gandolfo, while the third and final day took place at the Capitoline Hill, seat of the municipality of Rome.
The Rome Declaration
On its final day, 16 July, the Assembly concluded with a solemn session at Rome's Capitoline Hill, opening with greetings from the Mayor of Rome, Roberto Gualtieri. Speakers included Cardinal Baldo Reina, Vicar General of Rome; Fr. Andrea Ciucci, Chancellor of the Pontifical Academy for Life; Cardinal Silvano Maria Tomasi; Nobel laureate Maria Ressa; Professor David Gross; and Peace Ambassador Sharon Stone.
There, participants signed the Rome Declaration for an Unarmed and Disarming Peace in the Age of Artificial Intelligence, Nuclear and Autonomous Weapons, New Digital Protocols, and Emerging Models of Digital Development. Signed by Nobel laureates, international experts, scientists, religious leaders, and former heads of state and government, its six commitments call to:
- Defuse the coming arms race in both artificial intelligence and nuclear weapons before they come to define the next century.
- Ensure that AI is developed in the interest of humanity, in accordance with international law and human rights, with oversight of fully automated processes.
- Adopt an international treaty banning the irresponsible integration of AI into nuclear command, control, and launch systems, keeping meaningful human control at all times.
- Open new institutional pathways toward global AI governance, supporting the UN's Independent International Scientific Panel on Artificial Intelligence.
- Build a "digital commons" for gathering and sharing the data needed to understand and act on the risks of nuclear weapons and AI.
- Pursue the verifiable and irreversible elimination of nuclear weapons, reaffirming the Treaty on the Non-Proliferation of Nuclear Weapons (NPT) and the Treaty on the Prohibition of Nuclear Weapons (TPNW).
"Remember your humanity, and forget the rest," urged Professor David Gross, Nobel laureate in Physics, warning that the survival of present and future generations is at stake.