Book Review: Selfish Reasons To Have More Kids
Astral Codex Ten Podcast
Bryan Caplan’s is like the Bible. You already know what it says. You’ve already decided whether you believe or not. Do you really have to read it all the way through? But when you’re going through a rough patch in your life, sometimes it helps to pick up a Bible and look for pearls of forgotten wisdom. That’s where I am now. Having twins is a lot of work. My wife does most of it. My nanny does most of what’s left. Even so, the remaining few hours a day leave me exhausted. I decided to read the canonical book on how having kids is easier and more fun than you think, to see if maybe I...
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In Search Of /r/petfree
Astral Codex Ten Podcast
, and a few names always come up. and are unpopular, but if I read them with an open mind, I always end up sympathetic - neither lifestyle is persecuted in my particular corner of society, but the Redditors there have usually been through some crazy stuff, and I don’t begrudge them a place to vent. The one that really floors me is . The denizens of /r/petfree don’t like pets. Their particular complaints vary, but most common are: Some stores either allow pets or don’t enforce bans on them, and then there are pets go in those stores, and they are dirty and annoying. Some parks either...
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Highlights From The Comments On AI Geoguessr
Astral Codex Ten Podcast
Thanks to everyone who commented on .
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Testing AI's GeoGuessr Genius
Astral Codex Ten Podcast
Some of the more unhinged writing on superintelligence pictures AI doing things that seem like magic. Crossing air gaps to escape its data center. Building nanomachines from simple components. Plowing through physical bottlenecks to revolutionize the economy in months. More sober thinkers point out that these things might be physically impossible. You can’t do physically impossible things, even if you’re very smart. No, say the speculators, you don’t understand. Everything is physically impossible when you’re 800 IQ points too dumb to figure it out. A chimp might feel secure that...
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Moldbug Sold Out
Astral Codex Ten Podcast
Cathy Young’s new hit piece on Curtis Yarvin (aka Mencius Moldbug) doesn’t mince words. Titled , it describes him as an "inept", "not exactly coherent" "trollish, ill-informed pseudo-intellectual" notable for his "woefully superficial knowledge and utter ignorance". Yarvin’s fans counter that if you look deeper, he has good responses to Young’s objections: Both sides are right. The synthesis is that Moldbug sold out. In the late 2000s, Moldbug wrote some genuinely interesting speculations on novel sci-fi variants of autocracy. Admitting that the dictatorships of the 20th century were...
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The Populist Right Must Own Tariffs
Astral Codex Ten Podcast
President Trump’s approval rating to near-historic lows. With economic disruption from the tariffs likely to hit next month, his numbers will probably get even worse; this administration could reach unprecedented levels of unpopularity. If I were a far-right populist, I would be thinking hard about a strategy to prevent the blowback from crippling the movement. Such a strategy is easy to come by. Anger over DOGE and deportations has a natural floor. If Trump’s base starts abandoning him, it will be because of the tariffs. But tariffs aren’t a load-bearing part of the MAGA platform....
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AI Futures: Blogging And AMA
Astral Codex Ten Podcast
AI Futures Project is the group behind . I’ve been helping them with . Posts written or co-written by me include: - what’s behind that METR result showing that AI time horizons double every seven months? And is it really every seven months? Might it be faster? - a look at some of the response to AI 2027, with links to some of the best objections and the team’s responses. - why we predict that America will stay ahead of China on AI in the near future, and what could change this. I will probably be shifting most of my AI blogging there for a while to take advantage of access to the...
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Links For April 2025
Astral Codex Ten Podcast
[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.]
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Highlights From The Comments On POSIWID
Astral Codex Ten Podcast
(original post: ) … Thanks to everyone who commented on this controversial post. Many people argued that the phrase had some valuable insight, but disagreed on what it was. The most popular meaning was something like “if a system consistently fails at its stated purpose, but people don’t change it, consider that the stated purpose is less important than some actual, hidden purpose, at which it is succeeding”. I agree you should consider this, but I still object to the original phrase, for several reasons.
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Come On, Obviously The Purpose Of A System Is Not What It Does
Astral Codex Ten Podcast
(see Wikipedia: ) Consider the following claims The purpose of a cancer hospital is to cure two-thirds of cancer patients. The purpose of the Ukrainian military is to get stuck in a years-long stalemate with Russia. The purpose of the British government is to propose a controversial new sentencing policy, stand firm in the face of protests for a while, then cave in after slightly larger protests and agree not to pass the policy after all. The purpose of the New York bus system is to emit four billion tons of carbon dioxide. These are obviously false.
info_outlineIn Ballad of the White Horse, G.K. Chesterton describes the Virgin Mary:
Her face was like an open word
When brave men speak and choose,
The very colours of her coat
Were better than good news.
Why the colors of her coat?
The medievals took their dyes very seriously. This was before modern chemistry, so you had to try hard if you wanted good colors. Try hard they did; they famously used literal gold, hammered into ultrathin sheets, to make golden highlights.
Blue was another tough one. You could do mediocre, half-faded blues with azurite. But if you wanted perfect blue, the color of the heavens on a clear evening, you needed ultramarine.
Here is the process for getting ultramarine. First, go to Afghanistan. Keep in mind, you start in England or France or wherever. Afghanistan is four thousand miles away. Your path takes you through tall mountains, burning deserts, and several dozen Muslim countries that are still pissed about the whole Crusades thing. Still alive? After you arrive, climb 7,000 feet in the mountains of Kuran Wa Munjan until you reach the mines of Sar-i-Sang. There, in a freezing desert, the wretched of the earth work themselves to an early grave breaking apart the rocks of Badakhshan to produce a few hundred kilograms per year of blue stone - the only lapis lazuli production in the known world.
Buy the stone and retrace your path through the burning deserts and vengeful Muslims until you’re back in England or France or wherever. Still alive? That was the easy part. Now you need to go through a chemical extraction process that makes the Philosopher's Stone look like freshman chem lab. "The lengthy process of pulverization, sifting, and washing to produce ultramarine makes the natural pigment … roughly ten times more expensive than the stone it came from."
Finally you have ultramarine! How much? I can’t find good numbers, but Claude estimates that the ultramarine production of all of medieval Europe was around the order of 30 kg per year - not enough to paint a medium-sized wall. Ultramarine had to be saved for ultra-high-value applications.
In practice, the medievals converged on a single use case - painting the Virgin Mary’s coat.