r/slatestarcodex is a subreddit with 82k members. The community frequently discusses looking for, ai, worst, philosophy, and technology, and they frequently recommend/review simulation software, charities, and nootropic, and the most common flair used is ai, medicine, rationality, meta, and science.
Slate Star Codex was the former name for a blog by Scott Alexander about human cognition, politics, and medicine. In 2021, the name was changed to Astral Codex Ten: https://astralcodexten.substack.com/
Popular Topics in r/slatestarcodex
#1
Looking For
36 posts
#2
Ai
36 posts
#3
Worst
11 posts
#4
Philosophy
9 posts
#5
Technology
8 posts
#6
Hate
6 posts
#7
Intelligence
6 posts
#8
Writing
5 posts
#9
Future
5 posts
#10
Ethics
4 posts
Products Discussed in r/slatestarcodex
Simulation Software
1 review
#1
Microsoft Excel
3.0★ from 1 review
Charities
1 review
#1
Giving What We Can
5.0★ from 1 review
Nootropic
1 review
#1
Cerebrolysin
4.0★ from 1 review
Flair Used in r/slatestarcodex
#1
AI
: "Reinforcement Learning on Forecasting will give us a Superhuman Forecaster"
7 posts
#2
Medicine
: "Ending respiratory infections"
4 posts
#3
Rationality
: "I Just Say Yes: Notes on losing my thinking to AI, and one idea for fighting it"
4 posts
#4
Meta
: ""Scott Alexander as a modern-day Edmund Wilson""
2 posts
#5
Science
: "Where to Find the Colors Your Screen Can’t Show You"
1 post
#6
Politics
: "The Harm in Hate Speech Laws"
1 post
#7
Genetics
: "Irish Travellers, the most interesting ethnic minority you never heard of"
1 post
#8
Misc
: "Scott's call for a better dating app: Not A Zombie is now Live!"
1 post
Member Growth in r/slatestarcodex
Yearly
+11k members(15.0%)
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Last updated: July 6, 2026