Astral Codex Ten Podcast

[This is one of the finalists in the 2025 review contest, written by an ACX reader who will remain anonymous until after voting is done. I'll be posting about one of these a week for several months. When you've read them all, I'll ask you to vote for a favorite, so remember which ones you liked] I. THE TASTE OF VICTORY The Tupinambá people ate their enemies. This fact scared Hans Staden , a German...

I. Eliezer Yudkowsky's Machine Intelligence Research Institute is the original AI safety org. But the original isn't always the best - how is Mesopotamia doing these days? As money, brainpower, and prestige pour into the field, MIRI remains what it always was - a group of loosely-organized weird people, one of whom cannot be convinced to stop wearing a sparkly top hat in public. So when I was doin...

[This is one of the finalists in the 2025 review contest, written by an ACX reader who will remain anonymous until after voting is done. I'll be posting about one of these a week for several months. When you've read them all, I'll ask you to vote for a favorite, so remember which ones you liked] If you've been following this blog for long, you probably know at least a bit about pharmaceutical rese...

[I haven't independently verified each link. On average, commenters will end up spotting evidence that around two or three of the links in each links post are wrong or misleading. I correct these as I see them, and will highlight important corrections later, but I can't guarantee I will have caught them all by the time you read this.] https://www.astralcodexten.com/p/links-for-september-2025

"You made him lower than the angels for a short time..." God: …and the math results we're seeing are nothing short of incredible. This Terry Tao guy - Iblis: Let me stop you right there. I agree humans can, in controlled situations, provide correct answers to math problems. I deny that they truly understand math. I had a conversation with one of the humans recently, which I'll bring up here for th...

You can sign the letter here . The Trump administration has been retaliating against its critics , and people and groups with business before the administration have started laundering criticism through other sources with less need for goodwill. So I have been asked to share an open letter , which needs signatures from scientists, doctors, and healthcare professionals. The authors tell me (THIS IS...

AI psychosis ( NYT , PsychologyToday ) is an apparent phenomenon where people go crazy after talking to chatbots too much. There are some high-profile anecdotes, but still many unanswered questions. For example, how common is it really? Are the chatbots really driving people crazy, or just catching the attention of people who were crazy already? Isn't psychosis supposed to be a biological disease?...

Finalist #9 in the Review Contest [This is one of the finalists in the 2025 review contest, written by an ACX reader who will remain anonymous until after voting is done. I'll be posting about one of these a week for several months. When you've read them all, I'll ask you to vote for a favorite, so remember which ones you liked] Ollantay is a three-act play written in Quechua, an indigenous langua...

[original post here ] #1: Isn't it possible that embryos are alive, or have personhood, or are moral patients? Most IVF involves getting many embryos, then throwing out the ones that the couple doesn't need to implant. If destroying embryos were wrong, then IVF would be unethical - and embryo selection, which might encourage more people to do IVF, or to maximize the number of embryos they get from...

Finalist #8 in the Review Contest [This is one of the finalists in the 2025 review contest, written by an ACX reader who will remain anonymous until after voting is done. I'll be posting about one of these a week for several months. When you've read them all, I'll ask you to vote for a favorite, so remember which ones you liked] I. The Men Are Not Alright Sometimes I'm convinced there's a note tap...

A guest post by David Schneider-Joseph The "amyloid hypothesis" says that Alzheimer's is caused by accumulation of the peptide amyloid-β. It's the leading model in academia, but a favorite target for science journalists, contrarian bloggers, and neuroscience public intellectuals, who point out problems like: Some of the research establishing amyloid's role turned out to be fraudulent. The level of...

[Original post: Should Strong Gods Bet On GDP? ] 1: Comments About The Theory 2: Comments About Specific Communities 3: Other Comments Comments About The Theory Darwin writes : I think you may (*may*, I'm not sure) be vastly underestimating how many people are in some form of nontraditional tight-knit community. Notice that many of the communities you list are things you've directly personally enc...

[This is one of the finalists in the 2025 review contest, written by an ACX reader who will remain anonymous until after voting is done. I'll be posting about one of these a week for several months. When you've read them all, I'll ask you to vote for a favorite, so remember which ones you liked] My dad only actually enjoys about ten foods, nine of them beige. His bread? White. His pizza? Cheese. H...

Slightly contra Fukuyama on liberal communities Francis Fukuyama is on Substack; last month he wrote Liberalism Needs Community . As always, read the whole thing and don't trust my summary, but the key point is: R. R. Reno, editor of the magazine First Things, the liberal project of the past three generations has sought to weaken the " strong Gods " of populism, nationalism, and religion that were...

Finalist #6 in the Review Contest [This is one of the finalists in the 2025 review contest, written by an ACX reader who will remain anonymous until after voting is done. I'll be posting about one of these a week for several months. When you've read them all, I'll ask you to vote for a favorite, so remember which ones you liked] When the prefect of Alexandria's daughter converted to Christianity,...

[see footnote 4 for conflicts of interest] In 2021, Genomic Prediction announced the first polygenically selected baby . When a couple uses IVF, they may get as many as ten embryos. If they only want one child, which one do they implant? In the early days, doctors would just eyeball them and choose whichever looked healthiest. Later, they started testing for some of the most severe and easiest-to-...

I promised some people longer responses: Thomas Cotter asks why people think "consistency" is an important moral value. After all, he says, the Nazis and Soviets were "consistent" with their evil beliefs. I'm not so sure of his examples - the Soviets massacred workers striking for better conditions, and the Nazis were so bad at race science that they banned IQ tests after Jews outscored Aryans - b...

Jul 26, 2025 Finalist #5 in the Review Contest [This is one of the finalists in the 2025 review contest, written by an ACX reader who will remain anonymous until after voting is done. I'll be posting about one of these a week for several months. When you've read them all, I'll ask you to vote for a favorite, so remember which ones you liked] Introduction The Astral Codex Ten (ACX) Commentariat is...

We're running another ACX Grants round! If you already know what this is and just want to apply for a grant, use the form here (should take 15 - 30 minutes), deadline August 15. If you already know what this is and want to help as a funder , VC , partner charity , evaluator , or friendly professional , click the link for the relevant form, same deadline. Otherwise see below for more information. W...

[previously in series: 1 , 2 , 3 , 4 , 5 , 6 ] It is eerily silent in San Francisco tonight. Since Mayor Lurie's crackdown, the usual drug hawkers, catcallers, and street beggars are nowhere to be seen. Still, your luck can't last forever, and just before you reach your destination a man with bloodshot eyes lurches towards you. You recognize him and sigh. "Go away!" you shout. "Hey man," says Mark...

[This is one of the finalists in the 2025 review contest, written by an ACX reader who will remain anonymous until after voting is done. I'll be posting about one of these a week for several months. When you've read them all, I'll ask you to vote for a favorite, so remember which ones you liked] https://www.astralcodexten.com/p/your-review-islamic-geometric-patterns

I. A thought I had throughout reading L.R. Hiatt's Arguments About Aborigines was: What are anthropologists even doing? The book recounts two centuries' worth of scholarly disputes over questions like whether aboriginal tribes had chiefs. But during those centuries, many Aborigines learned English, many Westerners learned Aboriginal languages, and representatives of each side often spent years emb...

[This is one of the finalists in the 2025 review contest, written by an ACX reader who will remain anonymous until after voting is done. I'll be posting about one of these a week for several months. When you've read them all, I'll ask you to vote for a favorite, so remember which ones you liked] "The scientific paper is a ' fraud ' that creates "a totally misleading narrative of the processes of t...

Steven Byrnes is a physicist/AI researcher/amateur neuroscientist; needless to say, he blogs on Less Wrong. I finally got around to reading his 2024 series giving a predictive processing perspective on intuitive self-models . If that sounds boring, it shouldn't: Byrnes charges head-on into some of the toughest subjects in psychology, including trance, amnesia, and multiple personalities. I found h...

  In June 2022, I bet a commenter $100 that AI would master image compositionality by June 2025. DALL-E2 had just come out, showcasing the potential of AI art. But it couldn't follow complex instructions; its images only matched the "vibe" of the prompt. For example, here were some of its attempts at "a red sphere on a blue cube, with a yellow pyramid on the right, all on top of a green table". At...