On May 25, 2026, Pope Leo XIV stood in the Vatican’s Synod Hall and presented Magnifica Humanitas, his encyclical on artificial intelligence. Beside two cardinals sat the lay speaker chosen to address the room, Chris Olah, a co-founder of Anthropic and self-described atheist working to develop the “soul” of its AI model, Claude.
The Catholic Church, the West’s oldest institution, has long stood at the forefront of the day’s most important moral questions. It has often found itself opposed to insidious ideologies that swept the globe. In the 1930s and ’40s, the Vatican waged a secret war against Nazism. Then it took on Communism. But at the start of the 21st century, a new ideology emerged that would eventually take hold among wealthy tech elites called Effective Altruism, or EA.
Developed from the stark utilitarian philosophy of Princeton University’s Peter Singer, EA claims to use evidence and reason to determine how to benefit others as efficiently as possible. Effective Altruists like Bill Gates and Anthropic’s Dario Amodei direct enormous sums of money toward causes they believe will produce the greatest measurable benefit, regardless of whether those causes are personally meaningful to them.