The Catholic Priest Who Helped Write Anthropic’s A.I. Ethics Code; Observer, March 31, 2026

Alexandra Tremayne-Pengelly , Observer; The Catholic Priest Who Helped Write Anthropic’s A.I. Ethics Code

"Father Brendan McGuire is writing a novel about a disenchanted monk and his A.I. companion. He’s doing it with Claude. That detail—a Catholic priest using Anthropic’s chatbot to explore questions of faith and artificial consciousness—tells you something about where Silicon Valley’s moral reckoning has arrived. McGuire, 60, leads St. Simon Catholic Parish in Los Altos, Calif., a congregation that counts some of the Valley’s A.I. researchers among its members. Earlier this year, he and a group of faith leaders helped Anthropic shape the Claude Constitution, the set of guiding principles governing how its A.I. behaves.

He is not, in other words, an outside critic. He is something more complicated: a true believer in both God and technology, trying to hold them in the same hand. “I left the tech industry, but it never really left me,” McGuire told Observer...

McGuire wasn’t Anthropic’s only religious collaborator. Bishop Paul Tighe of the Vatican’s Dicastery for Culture and Education and Brian Patrick Green, a technology ethics director at Santa Clara University, also reviewed the Claude Constitution. Green and other Catholic scholars recently filed a federal court brief supporting Anthropic in its lawsuit against the U.S. government, which challenges the company’s effective blacklisting by the Pentagon after it refused to allow its A.I. systems to be used for autonomous warfare or domestic surveillance. The brief praised those ethical limits as “minimal standards of ethical conduct for technical progress.”...

Anthropic says its engagement with religious voices—part of a broader effort to engage a wide variety of communities to keep pace with technological acceleration—is only a beginning. The company plans to expand outreach beyond Catholic institutions to other religious leaders going forward."