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Australian moral philosopher, Professor of Bioethics emeritus at Princeton University; author of Animal Liberation, Practical Ethics and The Life You Can Save.

• 9 in 10 children in the world’s poorest countries cannot read this sentence. In my new Substack issue, I look at why the global education crisis is not quite the crisis many of us think it is, and why some solutions are remarkably effective. #PeterSinger #Education #GlobalPoverty

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Economics professor at the University of California, Berkeley and a former Deputy Assistant Secretary of the US Treasury. Author of Slouching Towards Utopia and writer of the Grasping Reality newsletter.

• Equity investors sell the dream; bond investors price the funeral. Here’s what they’re charging those undertaking the now debt-financed DataCenter Rush: **Debt & DataCenters: CHART OF THE DAY** FaceBook bankrupt in one scenario in fifteen in five years? SpaceX & Oracle one in six? That appears to be what those willing to lend to FaceBook right now are thinking... https://braddelong.substack.com/p/hyperscaler-debt-default-risk > 2026-09-15

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Economics professor at the University of California, Berkeley and a former Deputy Assistant Secretary of the US Treasury. Author of Slouching Towards Utopia and writer of the Grasping Reality newsletter.

• “Does not replicate” is a very polite way of putting this. Overly polite. By a lot. By a factor of x100, perhaps: **CROSSPOST: ANDREW GELLMAN: “Replication Crisis”, Dan Ariely Files** Andrew’s title: “I am shocked, shocked to learn that this 2002 paper by Dan Ariely is based on dubious data & doesn’t replicate”; but in addition to frauds, there are the honest but non-robust too... https://braddelong.substack.com/p/crosspost-andrew-gellman-replication > 2026-09-14

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Economist and journalist; Financial Times columnist as The Undercover Economist, author of How to Make the World Add Up, and presenter of the Cautionary Tales podcast.

• “Never stay for a long time in one place... When you stop somewhere... things start to stick. When you go from one place to another, you are cleaning yourself.” photographer Josef Koudelka, quoted in @casparhenderson 's new substack.

  thekinetikon.substack.com

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Writer of the newsletter bookbear express, on psychology, relationships, non-attachment and taste; based in San Francisco.

• just realized replies to my substack posts to have been going to spam for, oh, about a year. SORRY IF YOU EMAILED ME 💔💔💔

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Economics professor at the University of California, Berkeley and a former Deputy Assistant Secretary of the US Treasury. Author of Slouching Towards Utopia and writer of the Grasping Reality newsletter.

• Forty-three years a teacher, a role model who treated every economy as a system worth understanding whole, and a friend to me, always insisting you check all the boxes—and then go away, think harder, and circle back: **In Memory of Jeffrey Williamson: SATURDAY “SLOUCHING” & FRIENDS** Economic history & related topics: The man who woke up eager, and the discipline of working as hard as you can to get the numbers right... https://braddelong.substack.com/p/in-memory-of-jeffrey-williamson-saturday > 2026-09-06

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Statistician and Chief Scientist at Posit (RStudio). Author of the ggplot2, dplyr and tidyverse R packages and of books on R programming and data science.

• I wrote up the talk I gave for userR! 2025: tidydesign.substack.com/p/a-no-bulls.... A lot has changed in the last 12 months, but the bulk of this talk still resonates with me.

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Economics professor at the University of California, Berkeley and a former Deputy Assistant Secretary of the US Treasury. Author of Slouching Towards Utopia and writer of the Grasping Reality newsletter.

• I asked a local instantiation of google/gemma4:31b-mlx to introduce itself to my new research assistants and point at its own workspace. What came back was a meditation on Plato, salamander brains, and why you should treat it like an eccentric roommate: **ThothBot Makes an Appearance in My RA-Group Telegram Chat: FRIDAY FOG & FLATLANDS** Living & working in Berkeley, California: An AI writes an introduction to my research assistants, & PanGram/SubStack grades it 100% not-slop; or, what... 1/

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Mathematical biologist; Senior Lecturer in the Department of Mathematical Sciences at the University of Bath and author of The Maths of Life and Death and How to Expect the Unexpected.

• x.comI was on BBC Inside Science yesterday with Roland Pease as Presenter's Friend. We talked about a new way of dating an artefact, the appearance of a decagon on Saturn and a about a hint of dark matter. You can read all about it on my substack here: https://t.co/A6f2H6rcEg? 1/2

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• BlueskyI was on BBC Inside Science yesterday with Roland Pease as Presenter's Friend. We talked about a new way of dating an artefact, the appearance of a decagon on Saturn and a about a hint of dark matter. You can read all about it on my substack here: kityates.substack.co...? 1/2

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Writer and programmer; co-founder of the software studio Postlight and author of the Bloomberg Businessweek essay What Is Code?

• A neat project at work: We built an archive for Lapham's Quarterly as part of its (gradual, ongoing) relaunch—full access if you subscribe. It's been nice to see and read it again. Ping if you find bugs. archive.laphamsquarterly.org (they relaunched temporarily at laphamsquarterly.substack.com).

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Economics professor at the University of California, Berkeley and a former Deputy Assistant Secretary of the US Treasury. Author of Slouching Towards Utopia and writer of the Grasping Reality newsletter.

• Paul Krugman’s Substack has become essential reading, and this piece exemplifies why: a clean takedown of the Trump-Bessent claim that Ukraine and “the conflict Iran” bear responsibility for high fuel prices today: **CROSSPOST: PAUL KRUGMAN: Imperialist Delusions & the Price of Fuel** Paul’s subheadline: “Trump & Bessent tried to betray Ukraine. Now they don’t have any cards”… https://braddelong.substack.com/p/crosspost-paul-krugman-imperialist > 2026-09-03

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Economics professor at George Mason University and author of The Myth of the Rational Voter, Selfish Reasons to Have More Kids, The Case Against Education and Open Borders. Writes Bet On It.

• AMA Today at 5PM ET

  I’m doing an AMA on Substack Live today at 5 PM ET. If you’re a subscriber, expect an email a minute or so before. If you want to participate, subscribe. I’m happy to talk about the three books I have coming out over th…

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Independent iOS developer and podcaster; co-hosts the Accidental Tech Podcast and Analog(ue), and makes the apps Callsheet, MaskerAid and Peek-a-View.

• If I’m linking to a Substack article — or Medium — you know it’s worth it. I know this is very old news, but Dolly was a gift.

  heathercoxrichardson.substack.com

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Essayist; writes Astral Codex Ten, previously Slate Star Codex.

• Highlights From The Comments On The Substack Religion Debate

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Swedish programmer with degrees in engineering and psychology, author of Your Code as a Crime Scene and founder of CodeScene.

• I made a conscious effort to unplug during my vacation. Coming back, I noticed the lovely new Substack feature: Scan for AI text. Coincidentally, I had updated the About section for my Substack a while back with some notes on what my blog is *not*: "## What this isn’t Content creation isn’t my job. I write these articles because I a) love to write, and b) care deeply about our profession. It’s a fun hobby, not a job. Consequently, I don’t feel any pressure to publish on a schedule. I’d rather publish less and maintain a higher quality bar. So far, that has worked out to roughly one article pe…

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Author of Quiet: The Power of Introverts and of Bittersweet; writes The Quiet Life newsletter.

• I'm doing a Substack Live, TODAY at 2 pm ET, with Sarah Fay! Open to all.

  Are you a "Substack Writer at Work"? This one's for you.

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Economist at the Hoover Institution; wrote The Fiscal Theory of the Price Level and blogs as The Grumpy Economist.

• Pay Your Debts: Alexander Hamilton

  This is an essay I wrote for Hoover’s Freedom Frequency substack, in their series on the founders.

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Economist; Professor of the Practice of Economic Policy at Harvard, nonresident senior fellow at the Peterson Institute, and Chairman of the US Council of Economic Advisers from 2013 to 2017.

• One of the most consequential and thoughtful economic policymakers of last 30+ years--@genebsperling --is now on Substack, I subscribed.

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Machine learning engineer and independent AI consultant. He writes about LLM evaluation, tooling and applied ML at hamel.dev, and previously worked on machine learning at GitHub.

• substack-stats — Interactive dashboard for public Substack newsletter revenue modeling

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Writer and podcaster; co-author of Abundance with Ezra Klein, a staff writer at The Atlantic from 2008 to 2025, and host of the Plain English podcast.

• The Derek Thompson Substack Turns 1! Here's How the Newsletter Is Doing

  Thank you for being a paid subscriber! And please use this birthday to tell me what you want this newsletter to grow into

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Writer and former Substack product manager; publishes essays and interviews on technology, culture and China at jasmi.news.

• 🌻 conversations on culture in the AI age

  my Substack talk and conversation with Benjamín Labatut

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Writer and former Substack product manager; publishes essays and interviews on technology, culture and China at jasmi.news.

• thank you substack & sana & odd lots & pangram & new york city !!! back 🔜

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Professor of psychology at the University of Toronto and Brooks and Suzanne Ragen Professor Emeritus at Yale. Author of Against Empathy, The Sweet Spot and Psych, and writer of the Small Potatoes newsletter.

• Moneyball for book publishers and Substack writers

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Novelist and critic, author of The Body Scout and Metallic Realms; writes the newsletter Counter Craft on fiction craft and the publishing industry.

• Scavenging in the Media Wastelands: Or, Substacking While Trying to Make a Living Writing

  Chatting with John Warner about the state of literary magazines, freelancing, Substack, and vanishing writing careers.

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Writer and consultant on technology, organizations and history; founded the blog Ribbonfarm and now writes the Contraptions newsletter.

• Ribbonfarm has been resurrected as a museum blog with an AI curator. Details: https://t.co/InHymQ7kS3 The old reading experience is preserved intact, with significantly improved speed and cleaner reading layout, but there’s now a lot more intelligent scaffolding for exploring.

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Software engineer who writes about low-level and systems programming at nullprogram.com; author of the Elfeed feed reader, the Endlessh SSH tarpit and Enchive.

• I have officially retired from Emacs

  This article was discussed on reddit and on Hacker News. This past Tuesday I typed C-x C-c in Emacs for the last time after 20 years of daily use. Though nearly half that time was gradually retiring it, switching to mod…

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Founder of Pinboard; writes Idle Words — talks and essays on the web, aviation, politics and travel.

• New Martian Writing

  If you've enjoyed my writing about space over the years, I invite you to subscribe to my new substack newsletter, titled 'Mars for the Rest of Us', where I've been posting weekly essays on topics around Mars exploration…

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Economist; Ronald A. Kurtz Professor of Entrepreneurship at MIT Sloan, former chief economist of the International Monetary Fund, and co-author of 13 Bankers and Power and Progress.

• https://t.co/BByvQpLiwH latest episode of Power and Consequences (Gary Gensler and Simon Johnson) on Economic Impacts from the Iran Conflict; substack post links to data sources and suggested additional reading #OOTT

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Swedish essayist who writes Escaping Flatland, a newsletter of essays on relationships, thinking, writing and homeschooling.

• An underappreciated thing about Substack is that it has slow virality. That social media thing where you have to churn out content because it is forgotten after three days is much less the case here. If you want to, you can put in serious effort into making a properly good piece, and it will keep getting read for years. This is a very good thing for both readers and writers, and I wish more people leaned into making few but exceptional pieces: doing things well is a viable strategy here in a way that it wasn’t on older platforms.

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Swedish essayist who writes Escaping Flatland, a newsletter of essays on relationships, thinking, writing and homeschooling.

• When my Substack had sub-100 subscribers, I would contact nearly everyone who commented (on internet forums where I cross posted my essays). Most people are up for a conversation if they think you wrote a decent post, but it usually doesn’t happen if you’re not the one asking for it. I met some truly extraordinary people that way, and grew so much from our conversations. I think it is a very underrated way to use the internet.

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Game designer and director of the NYU Game Center; made Universal Paperclips and writes Donkeyspace.

• An Introduction to Donkeyspace

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AI research engineer working on large language models. He writes the Ahead of AI newsletter and is the author of Build a Large Language Model (From Scratch).

• LLM Research Papers: The 2025 List (July to December)

  In June, I shared a bonus article with my curated and bookmarked research paper lists to the paid subscribers who make this Substack possible.

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Co-founder and CTO of Honeycomb; previously an infrastructure engineer at Parse, Facebook and Linden Lab, and co-author of Observability Engineering.

• Moving from WordPress to Substack

  After a decade on WordPress, it's time to try something new.

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Writer and former Substack product manager; publishes essays and interviews on technology, culture and China at jasmi.news.

• 🌻 expanding the market for culture (ft. celine nguyen)

  internet autodidacts, writing on Substack, contrarian optimism about AI

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Investment researcher and engineer who runs Lyn Alden Investment Strategy, writing on macroeconomics, currency systems and equity analysis.

• The Power of Nostr: Decentralized Social Media and More

  Published: July 2024 It would be powerful if you could bring your digital identity, content, and followers from one social ecosystem, such as Twitter, LinkedIn, Instagram, or Substack, to another. Imagine if you could p…

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Writer and consultant on technology, organizations and history; founded the blog Ribbonfarm and now writes the Contraptions newsletter.

• Ribbonfarm readers may enjoy this podcast. Longest one I’ve ever done.
  Quoting@vgrWent on @gradientpub podcast last week with @spaniel_bashir (a must-read newsletter+podcast for keeping up with AI btw) for an extended 2-hour conversation on AI. We also talked protocols+AI in the last 20 minutes or so.

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Writer and consultant on technology, organizations and history; founded the blog Ribbonfarm and now writes the Contraptions newsletter.

• Ribbonfarm (the Wordpress blog) is experimenting with a rough, notebook style in 2024, with shorter, more frequent journal style entries (2-3/week, sometimes more), so not all links will be tweeted. If you want to keep up, you should probably sign up for the newsletter digest.

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