Zvi Mowshowitz is a writer, AI safety analyst, and former professional Magic: The Gathering player. He is best known for his Substack newsletter 'Don't Worry About the Vase,' which publishes detailed weekly AI updates and rationalist commentary to over 33,000 subscribers. Inducted into the Magic: The Gathering Pro Tour Hall of Fame in 2007, Zvi is also the founder of nonprofit policy think tank Balsa Research and co-founded MetaMed, a personalized medical research firm backed by Peter Thiel. He is a prominent voice in the rationalist and AI safety communities, known for his p(doom) estimates of 60-70% and his systematic, data-driven approach to understanding AI risk.
Kelsey Piper is an American journalist and effective altruism advocate best known for her work at Vox's Future Perfect newsletter, where she spent seven years covering AI safety, global catastrophic risks, evidence-based philanthropy, and education policy. She broke major stories including OpenAI's non-disparagement agreements and conducted the first post-collapse interview with Sam Bankman-Fried. In August 2025, she left Vox to co-found The Argument, a Substack newsletter focused on reasoned policy debate. A Stanford Symbolic Systems graduate who pledged 30% of her lifetime income to charity, Piper brings a rare combination of technical fluency, ethical rigor, and accessibility to some of the most consequential questions of our time.
Nelson Elhage is a systems engineer turned AI safety researcher who has left fingerprints across the modern software stack. At Anthropic, he co-authored foundational work on mechanistic interpretability and transformer circuits that shaped how the field understands language models. Before that, he was employee ~30 at Stripe and a founding engineer of Sorbet, the Ruby typechecker now used across one of the world's largest payment platforms. His open-source tools - reptyr, livegrep, and ministrace - are staples in the Linux hacker's toolkit. He blogs at 'Made of Bugs' and runs a Buttondown newsletter on computer systems.