YERI Yale Existential
Risks Initiative

Preventing the man‑made end of humanity as we know it

YERI is a Yale student group working on nuclear, biological, and AI risk, and on how they interact with each other and with climate change.

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Alessandro Zulli presenting on biosecurity to students in a Yale lecture hall
“An Introduction to AI and Biosecurity” with Alessandro Zulli, Research Scientist at SecureBio (PhD, Yale ’24). April 22, 2026.
existential risk (n.)
a man-made threat capable of destroying human civilization

Why now

  • 12,000+ warheads, thousands still on high alert
  • Gene synthesis cheap enough for a garage lab
  • AI capabilities advancing faster than our ability to control them

There is no second attempt at any of them.

What we work on

Nuclear Risk

Nuclear weapons and arms control.

Biological Risk

Engineered pathogens and biosecurity policy.

AI Risk

AI safety and governance.

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