Sasha Cooper
Bio
Sasha Cooper (online handle: Arepo) is a researcher and software developer active in the effective altruism community with a focus on global catastrophic risk and longtermism. He received a $36,000 grant from the Long-Term Future Fund in April 2022 to conduct supervised research on the probability of humanity becoming interstellar given non-existential catastrophe, work that led to the development of his open-source "longtermist risk calculator" — a pair of interactive tools for estimating humanity's probability of achieving a secure interstellar existence after major catastrophes. He has approximately five years of software development experience and has been studying data science. He co-founded Felicifia in 2008 (an early utilitarianism discussion forum), founded the EA Gather Town virtual community space, and served as a trustee of CEEALAR (the EA hotel in Blackpool) for five years. He describes himself as a "GCR-focused AI sceptic" and writes on moral philosophy and utilitarian ethics at his personal website. As of early 2024, he was based in the Netherlands with UK citizenship.
Links
- Personal Website
- https://valence-utilitarianism.fly.dev/
- Twitter / X
- LessWrong
- Arepo
Grants
from Long-Term Future Fund
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Details
- Last Updated
- Mar 23, 2026, 12:57 AM UTC
- Created
- Mar 20, 2026, 2:58 AM UTC