DiscoverLessWrong (30+ Karma)“Sublinear Utility in Population and other Uncommon Utilitarianism” by Alice Blair
“Sublinear Utility in Population and other Uncommon Utilitarianism” by Alice Blair

“Sublinear Utility in Population and other Uncommon Utilitarianism” by Alice Blair

Update: 2025-10-13
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Content warning: Anthropics, Moral Philosophy, and Shrimp

This post isn't trying to be self contained, since I have so many disparate thoughts about this. Instead, I'm trying to put a representative set of ideas forward, and I hope that if people are interested we can discuss this more in the comments. I also plan to turn this into a (probably small) sequence at some point.

I've had a number of conversations about moral philosophy where I make some claim like

Utility is bounded and asymptotically sublinear in number of human lives, but superlinear or ~linear in the ranges we will ever have to care about.

Common reactions to this include:

  • "Wait, what?"
  • "Why would that be the case?"
  • "This doesn't make any sense relative to my existing conceptions of classical utilitarianism, what is going on here?"

So I have gotten the impression that this is a decently [...]

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Outline:

(02:11 ) Aside: Utilitarianism

(02:28 ) The More Mathy Pointer

(03:15 ) Duplicate Simulations

(05:50 ) Slightly Different Simulations

(07:31 ) Utility Variation with Population

(07:51 ) More is Better

(08:06 ) In Some Domains, More is Superlinearly Better

(08:41 ) But Value Space is Limited

(09:21 ) What About The Other Animals?

(10:55 ) What Does this Mean About Classical EA?

(11:58 ) Other Curiosities

The original text contained 3 footnotes which were omitted from this narration.

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First published:

October 13th, 2025



Source:

https://www.lesswrong.com/posts/NRxn6R2tesRzzTBKG/sublinear-utility-in-population-and-other-uncommon


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Narrated by TYPE III AUDIO.


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Images from the article:

Not to scale
Not to scale
Not to scale because I have no idea what the scale even is, and that would probably be less illustrative
Graph showing utility versus number of humans, with
Circle filled with colorful dots labeled

Apple Podcasts and Spotify do not show images in the episode description. Try Pocket Casts, or another podcast app.

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“Sublinear Utility in Population and other Uncommon Utilitarianism” by Alice Blair

“Sublinear Utility in Population and other Uncommon Utilitarianism” by Alice Blair