Once you understand game theory, you understand the world.
Why Hacker News recommends it
HN commenters reach for it constantly as an approachable explanation of why cooperation and reciprocity are rational strategies.
What it is
Veritasium explores the Prisoner's Dilemma and Axelrod's tournaments, showing why tit-for-tat and forgiving strategies win in repeated games. It extends the ideas to cooperation in evolution and conflict.
Recommended by 10 HN commenters across 8 different months, 2023 to 2026.
What Hacker News said
Strong rec hughesjj · 2024-01 · on “Cells across the body talk to each other about aging”
Veratasium just made an approachable video on this subject recently, I definitely recommend. It rebukes the whole 'oh no I just heard what a Nash equilibrium is and now I'm worried cooperation is impossible long term' fears some people interpret his thought experiment (prisoners dillema) to have. Tldr it's rare that you can't coordinate, communicate, or have exactly one trial. [this video]
Strong rec pants2 · 2026-04 · on “The Future of Everything Is Lies, I Guess: Safety”
This Veritasium video is excellent, and makes the argument that there is something intrinsic in mathematics (game theory) that encourages prosocial behavior. [this video]
Recommends ninkendo · 2023-12 · on “Crown shyness”
The way I’ve always imagined crown shyness (from a total less-than-layman perspective where I’ve only casually read about the topic) is from a game theory/selfish gene perspective. Trees of the same species will share a lot of the same genes, and genes that code for non-shyness will grow to the detriment of the trees around them. Trees which critically are very likely to share a lot of the same genes. So that non-shyness gene will lose out in the long run against genes that code for shyness. It’s similar to the prisoner’s dilemma, with shyness being “cooperate” and non-shyness being “defect”. Groups of trees with cooperative strategies would do better collectively (and win out), even if a no
Recommends aeonik · 2023-12 · on “You've just been fucked by psyops [video]”
After watching this video, Veratasium's video brings me some modicum of hope at least: "What The Prisoner's Dilemma Reveals About Life, The Universe, and Everything" [this video] Practice spotting those cognitive biases. Your Wikipedia rabbit hole may start here: [LINK]
Recommends 0wis · 2024-01 · on “Fairness and kindness are not weaknesses”
According to game theory, you should have empathy but not too much. Its such a powerful theoretical finding for every aspect of life. I found it best explained in the Veritasium video on game theory [1] [1]: [this video]
Recommends travisgriggs · 2024-03 · on “The Forgiver's Dilemma: Can Letting Go Set You Free?”
To start with, I really enjoyed Veritaseum’s recent take on the “Prisoners Dillema” and Game Theory ( [this video] ). It seems appropriate to mention since it circles around this same “dillema” and even places a numerical value on the value of forgiving in game theory simulations. The historical part and layman’s reduction is good to. I think THIS article undersells the “Hold a Grudge” payoff: > David feels justified but might damage the relationship and stop Samantha from learning from her mistake. Most relationships have an ongoing bargaining element to them. Exchange of services, tit for tat, quid pro quo, pay each others backs, etc. Even when we pretend they don’t, or obscure them by wrapping
Recommends braiamp · 2024-12 · on “U.S. Supreme Court will hear arguments over TikTok divestment law”
Tik for tat exists, but only when you can have a clear communication about it. Veritasium did a piece about it for explaining for layman. [this video]
Recommends tiffanyh · 2025-05 · on “Game theory illustrated by an animated cartoon game”
Vertasium has a great video talking how Tit-for-Tat (Copycat) wins as a strategy (and how there was a math competition that proved it as well) [this video] --- This seems like a nice rebuild of the math competition performed years ago (as talked about in the video link above). Direct link to that part of the video: [this video]