Astral Codex Ten

Richard Dawkins

49 min read

Richard Dawkins

Article

Richard Dawkins is a recurring person in the Astral Codex Ten archive, appearing 8 times across 8 issues between May 10, 2021 and June 26, 2025. The archive places it in contexts such as “Its celebrities - Richard Dawkins”; “Its celebrities - Richard Dawkins, Christopher Hitchens, etc - travelled the globe”; “have a purple hard cover copy of one of Richard Dawkins’ books”. It most often appears alongside ACX, EA, Oxford.

Metadata

  • Category: People
  • Mention count: 8
  • Issue count: 8
  • First seen: May 10, 2021
  • Last seen: June 26, 2025

Appears In

Source Context

Recovered passages from the original issue text. When the raw archive preserved outbound links inside the source passage, they are listed directly under the quote.

The Rise And Fall Of Online Culture Wars
May 10, 2021 · Original source
New Atheism dominated a certain type of Internet discourse from its murky beginnings all the way until the early 2010s. During its golden age, it produced a dizzying array of atheist blogs, webcomics, videos, websites, and spaghetti-monster-themed merchandise. Its celebrities - Richard Dawkins, Christopher Hitchens, etc - travelled the globe, preaching a message that atheism vs. religion was the ur-conflict that fueled all other conflicts, the single most important thing to get right. Hitchens was "absolutely convinced that the main source of hatred in the world is religion and organized religion...absolutely convinced of that".
Meetups Everywhere 2021: Times And Places
August 23, 2021 · Original source
BUDAPEST, HUNGARY (RSVP) Contact: Timothy Underwood, timunderwood9[at]gmail[dot]com Time: 2:00 PM, Saturday, September 4 Location: We'll meet on Margit Island at Gulliver Park, which is a grassy area behind the bars that are past the fountain. I'll bring a green blanket like thing to sit on and have a purple hard cover copy of one of Richard Dawkins' books. We'll also have an open blue umbrella to mark who we are. If it is raining we'll go to champs sziget bar which is the first big bar on the right past the fountain. Coordinates: https://w3w.co/sticking.flipping.solid
Inline links: RSVP, https://w3w.co/sticking.flipping.solid
Book Review: The Scout Mindset
September 29, 2021 · Original source
The example of intellectual honor I find myself thinking about most often is a story related by Richard Dawkins from his years as a student in the zoology department at Oxford. At the time there was a major controversy in biology over a cellular structure called the Golgi apparatus - was it real or an illusion created by our observational methods?
Advice For Unwoke Academic?
March 10, 2022 · Original source
How Should We Assess New Atheism? Our last monoculture was the conservative/Christian hegemony of the mid-to-late 20th century. It gradually crumbled, but its most confrontational detractors - the New Atheists - ended up being judged harshly by history. Should we care about this? Maybe the New Atheists were an epiphenomenon who didn’t contribute at all to the decline of Christianity in America. Or maybe they contributed some appropriate amount they can be proud of, and we shouldn’t care whether or not people disliked them afterwards. If you were giving strategic advice to Richard Dawkins in 2005, would you have told him to tone it down? How analogous is the current situation?
Inline links: being judged harshly by history
Spring Meetups In Seventy Cities
April 10, 2022 · Original source
BUDAPEST, HUNGARY Contact: Timothy Underwood (timunderwood9@gmail.com) Date: May 7 Time: 2:00 PM Coordinates: https://plus.codes/8FVXG2CW+FF Location: In the middle of Gulliver Park on Margit Sziget, I'll have an umbrella and a big copy of a book by Richard Dawkins in Hungarian Group info: ACX/LW Budapest meets once a month
Inline links: https://plus.codes/8FVXG2CW+FF, ACX/LW Budapest
Meetups Everywhere 2022: Times & Places
August 26, 2022 · Original source
VIENNA, AUSTRIA Contact: Manuel, manuel[dot]turonian[at]gmail[dot]com Time: Saturday, September 10, 2:00 PM Location: Wiener Stadtpark at the Strauss Monument; will have an ACX Meetup sign. Coordinates: 8FWR693H+GP2 Event link(s): LessWrong Group info: Rationality Vienna is a group of about 30 people who meet once a month in person or via Zoom. You can join our Facebook group. Notes: We may want to shift to an indoor location depending on weather and the local Covid numbers. BRUSSELS, BELGIUM Contact: Bruno D, bruno[dot]astral[dot]codex[at]gmail[dot]com Time: Sunday, September 18, 4:00 PM Location: Guingette Henri, George Henri parc Coordinates: 9F26RCWC+84 Event link(s): LessWrong SOFIA, BULGARIA Contact: Anastasia, sofia[dot]acx[dot]meetup[at]gmail[dot]com Time: Saturday, September 17, 4:00 PM Location: Shade Garden (Сенчестата градинка; part of Borisova garden) Coordinates: 8GJ5M8GW+J9 Event link(s): LessWrong Group info: Sofia ACX started with last year's Meetups Everywhere round. We have Serious Meetups once per month at which we discuss a blog post, a short story, or a book (for instance, The Scout Mindset, The Money Illusion, The Metropolitan Man); and sporadic non-serious social meetups that mostly include getting dinner, going on a walk, watching a film, or playing board games. Attendance hovers around 6-8 people out of a pool of 13. People get invited to the Discord server after they've attended at least one in-person meetup. ZAGREB, CROATIA Contact: DJStern, dorian[dot]sternvukotic[at]gmail[dot]com Time: Saturday, September 3, 6:00 PM Location: Krivi Put Coordinates: 8FQQRX38+V6W Event link(s): LessWrong Group info: Croatian LessWrong active group communicates mainly through a Telegram group, we meetup semi regularly, approx once a month. The group is mostly social, and the meetups are not structured (sometimes we all just meet at a random party) Notes: Send me an Email and I will add you to a Telegram group where everything (active) LessWrong Croatia/Zagreb happens LIMASSOL, CYPRUS Contact: Arseniy, runescape[at]list[dot]ru, @anchorheld (Telegram / Instagram) Time: Saturday, September 3, 12:00 PM Location: By the Municipal Zoo Coordinates: 8G6MM3M3+Q6 Event link(s): LessWrong Notes: Please hit me up on Mail, Telegram, or Instagram if you're actually going PRAGUE, CZECH REPUBLIC Contact: Jiri Nadvornik, jiri[dot]nadvornik[at]efektivni-altruismus[dot]cz Time: Thursday, October 6, 6:00 PM Location: Garden of Dharmasala Teahouse Coordinates: 9F2P3CRW+FP7 Event link(s): LessWrong, Facebook event COPENHAGEN, DENMARK Contact: Søren Elverlin, soeren[dot]elverlin[at]gmail[dot]com Time: Saturday, September 24, 3:00 PM Location: Rundholtsvej 10, 2300 København S Coordinates: 9F7JMH38+GFP Event link(s): LessWrong, Facebook event, Meetup.com Notes: Please RSVP on LessWrong TALLINN, ESTONIA Contact: Andrew W, andrew_n_west[at]yahoo[dot]co[dot]uk Time: Monday, September 26, 7:00 PM Location: St Vitus, Tallinn. I don't know if anyone will turn up, but I'll be wearing a suit, a beard, and a book. Coordinates: 9GF6CPRH+MQ Event link(s): LessWrong HELSINKI, FINLAND Contact: Joe Nash, joenash499[at]gmail[dot]com Time: Saturday, September 3, 4:00 PM Location: Restaurant Töölönranta, Helsinginkatu 56 Coordinates: 9GG65WMJ+2J Event link(s): LessWrong Group info: LessWrong group FONTAINEBLEAU, FRANCE Contact: Ebrahim Akbari, ea[dot]akbari[at]gmail[dot]com Time: Saturday, September 10, 6:00 PM Location: Glasgow bar, Fontainebleau Coordinates: 8FW4CP32+J8 Event link(s): LessWrong PARIS, FRANCE Contact: Olivier, w20l2qtf[at]mailer[dot]me, We have a Discord and a matrix server (both servers are bridged together) Time: Friday, September 23, 6:00 PM Location: In the jardin du carrousel, next to jardin des Tuileries Coordinates: 8FW4V86J+GH Event link(s): LessWrong Group info: Regular meetups organized via discord or the newsletter every 3 months with around 20 people. Notes: We have a mailing list if you are interested in future meetups. Please don't hesitate to send me an email to RSVP that you're coming to help gauge the interest. TOULOUSE, FRANCE Contact: Alfonso, barsom[dot]maelwys[at]gmail[dot]com Time: Saturday, October 8, 7:00 PM Location: Bar 'Le Biergarten' (60 Gd Rue Saint-Michel, 31400 Toulouse). We'll be sitting at a table with an ACX MEETUP sign on it. Coordinates: 8FM3HCQW+9H Event link(s): LessWrong Notes: Please RSVP by email TBILISI, GEORGIA Contact: Evgenia Karunus, lakesare[at]gmail[dot]com, https://twitter.com/lakesare Time: Saturday, September 17, 7:00 PM Location: Coffee Place Coordinates: 8HH6MRQ2+WH Event link(s): LessWrong AACHEN, GERMANY Contact: Jörn, acx[at]j[dot]stoehler[dot]eu Time: Tuesday, September 27, 7:00 PM Location: Chico Mendes Coordinates: 9F28Q3HJ+9Q Event link(s): LessWrong Notes: Please RSVP here so I can reserve the right number of tables. BERLIN, GERMANY Contact: Ruben Arslan, ssc[at]alphabattle[dot]xyz Time: Sunday, October 2, 2:00 PM Location: Südplateau Fritz-Schloss-Park Coordinates: 9F4MG9H4+4X Event link(s): LessWrong, Google Calendar Notes: Please RSVP on LessWrong. I'll bring some beverages. COLOGNE, GERMANY Contact: Marcel Müller, marcel_mueller[at]mail[dot]de Time: Saturday, October 8, 5:00 PM Location: Marienweg 43, 50858 Köln, private venue, just ring the bell or follow the sign. Coordinates: 9F28WRMX+96H Event link(s): LessWrong Group info: LW / ACX / Rationalist meetup group. Monthly, mostly social meetups. Other activities welcome. Unless noted otherwise we will meet at Marienweg 43 in 50858 Cologne on the 2nd Saturday of each month at 5 pm. Please email me to be added to our mailing list where deviations will be posted. Caution! September Meetup will be at a different venue! Notes: If you read this you are welcome. Our Covid rules are still in effect: You must be tested negative on the same day. Self tests will be available at the meetup. If there is any problem, like you do not find us or I did not see your mail, call me +491788862254. FREIBURG IM BREISGAU, GERMANY Contact: Omar, info[at]rationality-freiburg[dot]de Time: Friday, October 14, 6:00 PM Location: FlexRooms, Salzstr. 1, 79098 Freiburg. We will carry a cardboard sign saying “Rationality Freiburg”. Coordinates: 8FV9XVV2+V56 Event link(s): LessWrong, Meetup.com, Website Group info: The group started in May 2022 and before the summer break we had five meetups with 4-11 people attending. Every two weeks seems like a good rhythm, but nothing is set in stone. So far we always read something beforehand and then discussed it, as well as trying some practical exercises such as TAPs and Personal Calibration. Afterwards we went to have dinner and continued talking about everything and anything for hours. Everything is new and flexible, so come and help us improve! Notes: We have a Signal messenger group and ask you to attend a meetup once to be able to join. HAMBURG, GERMANY Contact: Gunnar Zarncke, g[dot]zarncke[at]gmail[dot]com Time: Saturday, September 17, 5:00 PM Location: Kleine Wallanlagen on the lawn near Memorial Holstenglacis. Look for pink blankets; I will also have an ACX sign. Here is an Open Street Map link which also shows the short-cut tunnel from the subway station. Coordinates: 9F5FHX4H+RXC Event link(s): LessWrongLessWrong Notes: Please RSVP on LessWrong KARLSRUHE, GERMANY Contact: Marcus Wilhelm, mail[at]marcuswilhelm[dot]de Time: Saturday, September 24, 3:00 PM Location: Botanischer Garten Karlsruhe Coordinates: 8FXC2C72+85X Event link(s): LessWrong Group info: We meet weekly, alternating offline and online, see our LessWrong page KASSEL, HESSEN, GERMANY Contact: Tobias, Sphinxfire[at]outlook[dot]de Time: Saturday, September 10, 2:00 PM Location: Friedrichsplatz, to the left of the DocumentaHall Coordinates: 9F3F8F6X+R6 Event link(s): LessWrong Group info: Telegram group Notes: Please join the Telegram group if you are interested in coming. It will be helpful for coordinating something beyond 'let's just see who shows up and take it from there', plus, it will also make me feel a lot better on a purely subjective level if I know beforehand that at least one other person is interested. If you prefer the surprise factor of 'knowing as little as possible about who you're going to meet', you can also just write me via E-mail, of course. LEIPZIG, GERMANY Contact: Gunther Forderung, notavailable[at]riseup[dot]net Time: Tuesday, October 4, 6:00 PM Location: In the Lene-Voigt-Park, in the secluded area opposite of the swings Coordinates: 9F3J8CM2+PF Event link(s): LessWrong TÜBINGEN, GERMANY Contact: Emma, emma[dot]tuebingen[at]gmail[dot]com Time: Sunday, October 23, 6:00 PM Location: The ACX/SSC meetup and dinner (with vegan options) will be on October 23rd at the Annette Kade dormitory (Mohlstraße 44, 8FWFG3H5+XR). If you’d like to attend, please write me an email, and I’ll send you an invitation to our WhatsApp group. Coordinates: 8FWFG3H5+XR Event link(s): LessWrong Notes: Please email me to get my phone number. If a lot of people are out of town for the holidays and can't come we could meet on, say, October 1st. I would like to know how many people to expect. ATHENS, GREECE Contact: Spyros, spyros[dot]dovas[at]gmail[dot]com Time: Monday, September 5, 7:00 PM Location: On the plaza in front of the National Library Coordinates: 8G95WMQR+WRP Event link(s): LessWrong, Meetup.com Group info: We have organized 2 events so far, fall and spring, we just sit around and discuss. We have a Whatsapp group that hasn't picked up momentum yet. Notes: Please RSVP on LessWrong or Meetup.com BUDAPEST, HUNGARY Contact: Tim Underwood, timunderwood9[at]gmail[dot]com, WhatsApp 19513120591 Time: Sunday, September 11, 2:00 PM Location: Champs Sziget bar on Margit Sziget, near the front. I'll have a big hardcover copy in Hungarian of a book by Richard Dawkins. Coordinates: 8FVXG2CW+2H Event link(s): LessWrong Group info: We've been meeting in Budapest for two years now, with our first meeting being the 2020 ACX meetups everywhere. We meet about once a month, and usually we have two articles that are suggested reading that we discuss. CORK, IRELAND Contact: Mikey, Godojhana[at]gmail[dot]com Time: Thursday, September 29, 6:00 PM Location: If sunny: The Lough. If not, then the game arcade on the parade Coordinates: 9C3HVGQ7+JQ Event link(s): LessWrong DUBLIN, IRELAND Contact: Lucius, lucius[at]bushnaq[dot]de, LessWrong profile Time: Sunday, October 2, 12:30 PM Location: Clement & Pekoe, William Street South, Dublin 2. We'll be sitting inside, and there'll be a sign with ACX written on it on the table Coordinates: 9C5M8PRP+JV Event link(s): LessWrong Group info: LessWrong FOLIGNO, ITALY Contact: Mauro, orfino[at]yandex[dot]com, LW profile, Telegram Time: Saturday, September 24, 5:00 PM Location: Parco dei Canapé, at the open air cafe, ask the barista Coordinates: 8FJJXP22+HC Event link(s): LessWrong Notes: Please RSVP on LessWrong so I know how much food to get. No kids please. MILANO, ITALY Contact: Raffaele, raffa[dot]mauro[at]gmail[dot]com Time: Friday, September 16, 6:30 PM Location: Viale Luigi Majno, 18, 20129 Milano MI - Primo Ventures / T8P, IInd floor. Coordinates: 8FQFF6C4+9C Event link(s): LessWrong Group info: We meet once per month. The group started in May 2022. Notes: Please RSVP by email by the 1st of September PADOVA, ITALY Contact: Carlo, carlo[dot]martinucci[at]gmail[dot]com Time: Saturday, October 1, 3:30 PM Location: Prato della Valle, fountain in the middle. I'll be carrying a sign with ACX MEETUP on it :) Coordinates: 8FQH9VXG+9J Event link(s): LessWrong Notes: We'll probably find a bar to have a hot chocolate or tea or something :) PISA, ITALY Contact: Raffaele, raffaelesalvia[at]alice[dot]it Time: Saturday, October 22, 5:00 PM Location: We will meet in Piazza dei Cavalieri, near the steps of Palazzo della Carovana Coordinates: 8FMGPC92+R44 Event link(s): LessWrong ROMA, ITALY Contact: Grigorio, greghero12[at]gmail[dot]com, Facebook, +393920366026 Time: Saturday, October 8, 6:00 PM Location: We'll be around Gardenie metro station, at the benches, and I will be wearing a red shirt and sitting on top of the station to be seen Coordinates: 8FHJVHP9+8F Event link(s): LessWrong Group info: We meet around 20-25 times a year but it is asymmetrical, focused in summer, Christmas and Easter. We discuss opinions, engage in circling, play games where we spot logical fallacies and biases by attacking our members ideological weakpoints and formalize some debating stances. Occasionally we find the willpower to devote meetups in steelmanning and understanding the outgroup (roughly 4-5 times a year) Notes: If you are into ACX enough to see this post, I believe we have enough common ground to be worth meeting each other. Aren't you curious who else is within this niche community in Rome? Come on, take a leap of faith. P.S. Would be nice if you sent me a message in WhatsApp with your name and probability of attendance, but I love walk-ins just fine. No space limit after all ;-) RIGA, LATVIA Contact: Andis, cerulean[dot]lemniscate[at]protonmail[dot]com Time: Saturday, September 17, 4:00 PM Location: Bastejkalns (on top of the hill) Coordinates: 9G86X426+Q5Q Event link(s): LessWrong AMSTERDAM, NETHERLANDS Contact: Pierre, pierreavdb[at]gmail[dot]com Time: Saturday, September 10, 3:00 PM Location: Kanarie Klub (Bellamyplein 51, 1053 AT Amsterdam) Coordinates: 9F469V89+W4 Event link(s): LessWrong Group info: The rationality community is growing in the Netherlands, and we're now planning on having monthly meetups! Join the Rationality NL Discord server. Notes: Please RSVP on LessWrong so I can plan a different venue if needed DELFT, NETHERLANDS Contact: Pierre Bongrand, bongrand[dot]pierre[at]gmail[dot]com, 0033620644013 (Whatsapp/Telegram/Signal) Time: Thursday, September 22, 6:30 PM Location: Delftse Hout Beach, on the grass, in the center of the beach, I will be wearing a red T-shirt and carrying a sign with ACX MEETUP on it. Coordinates: 9F4629FG+66 Event link(s): LessWrong HATTEM, NETHERLANDS Contact: Shoshannah, shos[dot]rationality[at]gmail[dot]com, Discord: Dark#0849 Time: Saturday, October 8, 2:00 PM Location: Lijsterbeslaan 6, Hattem Coordinates: 9F48F378+PR Event link(s): LessWrong, Facebook event Group info: We support and coordinate groups across the country, including everything from social meetups to structured events and applied rationality. The intention is to connect all Dutch rationalists and rationalists in the Netherlands. We also discuss rationality topics online and coordinate events on our Discord server. Notes: Feel free to bring kids. Ours will be there :) Also, please park 't Heem if you are coming by car. It's a 2 minute walk to our house. HELMOND, NETHERLANDS Contact: Rutger, silvery[dot]swift[at]protonmail[dot]com Time: Saturday, September 17, 3:00 PM Location: De Motte (On top of the hill). Nearest road is Palladio. Coordinates: 9F37FMC5+VR Event link(s): LessWrong THE HAGUE, NETHERLANDS Contact: Kristof Redei, acxmeetup[at]kristof[dot]me Time: Wednesday, September 14, 6:00 PM Location: Paleistuin, Prinsessewal, 2513 EE Den Haag, Netherlands. We'll have a picnic blanket with an ACX sign on the large central field, somewhere near the playground. Coordinates: 9F4638J3+GP Event link(s): LessWrong, Facebook event Notes: Please RSVP on Facebook if possible! All ages/species welcome. If it's not outdoor weather, we'll go to The Bookstor Cafe next door as a backup. OSLO, NORWAY Contact: Hans Andreas & Jonas, acxoslomeetup[at]gmail[dot]com Time: Saturday, September 17, 1:00 PM Location: Look for the sign of Moloch at Café Billabong - Bogstadveien 53B 0366 Oslo Coordinates: 9FFGWPH7+QP Event link(s): LessWrong, Meetup.com Group info: We're hoping to do at least a quarterly meetup, but we'll base it on the turnout and enthusiasm of this event. Notes: The cafe has historically been accepting of guests' not ordering--please don't let financial reasons keep you away! GDAŃSK, POLAND Contact: Frank, frankastralcodexten[at]gmail[dot]com, Discord: frhrpr#1663 Time: Saturday, August 27, 3:00 PM Location: Next to Park Kuźniczki, opposite the train station, on the circular benches around the water pump; I will be wearing a red armband Coordinates: 9F6W9JJ4+JW Event link(s): LessWrong KRAKÓW, POLAND Contact: Mateusz Bagiński, bagginsmatthew[at]gmail[dot]com Time: Saturday, September 17, 2:30 PM Location: Celna 6/9, the office of the Optimum Pareto Foundation Coordinates: 9F2X2WVX+V2 Event link(s): LessWrong, Facebook event Group info: We meet every month, here is our Facebook group. LUBLIN, POLAND Contact: Piotr, piotrekzlublina[at]gmail[dot]com Time: Saturday, September 17, 5:00 PM Location: Między Słowami cafe, Rybna 4, Lublin Coordinates: 9G346HX8+FX Event link(s): LessWrong POZNAŃ, POLAND Contact: Ofelia Kerr, ofel[dot]kerr[at]gmail[dot]com, Discord: ofelia#0001 Time: Saturday, October 8, 6:00 PM Location: Van Gogh Pub, Żydowska 12, 61-761. I'll most likely be on the ground floor and I'll have an ACX sign. Coordinates: 9F4RCW5P+X3F Event link(s): LessWrong WARSAW, POLAND Contact: Michał, rationalwarsaw[at]gmail[dot]com Time: Sunday, September 4, 6:00 PM Location: Południk Zero, Wilcza 25 Coordinates: 9G4362G8+2V Event link(s): LessWrong, Meetup.com Group info: The community of Warsaw LessWrong/SSC/ACX/etc. readers is active for over 8 years now. We're trying to organise regular monthly meetups. You can join our Facebook group or Meetup.com. LISBOA, PORTUGAL Contact: Luís Campos, luis[dot]filipe[dot]lcampos[at]gmail[dot]com Time: Saturday, September 10, 3:00 PM Location: Jardim Amália Rodrigues, close to Linha d'Água cafe, in the top of a hill, below a bunch of trees Coordinates: 8CCGPRJW+V8 Event link(s): LessWrong Group info: We've been meeting every month for around 1 year. Get in contact if you want to participate in the WhatsApp group. :) BUCHAREST, ROMANIA Contact: Tony, skyrimtracer[at]gmail[dot]com Time: Sunday, October 16, 3:00 PM Location: Plaza România Mall, Bd. Timișoara 26 - food court Coordinates: 8GP8C2HM+9X Event link(s): LessWrong Notes: Please RSVP by email CLUJ-NAPOCA, ROMANIA Contact: Marius Pop, pop[dot]marius[at]gmail[dot]com Time: Saturday, September 3, 11:00 AM Location: Deva Host, Strada Deva 1-7 Coordinates: 8GR5QH8F+MW Event link(s): LessWrong BELGRADE, SERBIA Contact: Ivica Bogosavljevic, ibogosavljevic[at]gmail[dot]com, Viber +381 65 3473 433 Time: Monday, September 12, 6:00 PM Location: Pool Cafe on Prve pruge Coordinates: 8GP2RCP7+G7 Event link(s): LessWrong Notes: Please RSVP on my Viber number, so I know how big the room we need. BRATISLAVA, SLOVAKIA Contact: Viliam, viliam[at]bur[dot]sk Time: Saturday, September 10, 3:00 PM Location: Medická záhrada, by the fountain Coordinates: 8FWV44X9+XW8 Event link(s): LessWrong Notes: I will post an announcement on LessWrong later. In case of rain, a new meeting place nearby will be announced there. LJUBLJANA, SLOVENIA Contact: Demjan Vester, demjan[dot]vester[at]gmail[dot]com Time: Wednesday, September 14, 6:00 PM Location: Probably Lili Novy bar, near modern gallery and park Tivoli Coordinates: 8FRP3F3X+6V Event link(s): LessWrong, Meetup.com Group info: We meet about 0.7 times a month. Notes: Please RSVP because last time we just barely got a place big enough. BARCELONA, SPAIN Contact: Alfonso, alfonso[dot]martinez[at]upf[dot]edu, WhatsApp +34693846738 Time: Sunday, October 2, 5:30 PM Location: Parc de la Ciutadella, by the Lion Catcher statue; I'll have an ACX sign Coordinates: 8FH495QP+96 Event link(s): LessWrong Notes: The idea is to sit on the grass; bring a foulard along for your comfort, or a foldable chair if preferred. Don't worry about the language: English, Spanish, Catalan, we'll find a way. MADRID, SPAIN Contact: Jaime, jaimesevillamolina[at]gmail[dot]com Time: Saturday, September 10, 5:00 PM Location: Teatro de títeres del Parque del Retiro. We'll be on the stands with an ACX sign Coordinates: 8CGRC897+F8C Event link(s): LessWrong Group info: We are an EA / rationality group, we've been active for around 5 years but have less in-person activity since the pandemic started. We have a WhatsApp group and a channel in the Spanish-speaking EA Slack. SEVILLA, SPAIN Contact: Edu, edur[dot]acx[at]gmail[dot]com Time: Saturday, September 10, 8:00 PM Location: Parque de María Luisa. I'll be on the grass behind the Museum of Popular Arts and Traditions. I'll be the guy next to an ACX sign, a white wooden chair, and a cardboard ukulele with a tiny cardboard hat on it. Coordinates: 8C9P92F6+3RG Event link(s): LessWrong GOTHENBURG, SWEDEN Contact: Joacim, joacimj[at]gmail[dot]com Time: Saturday, September 24, 3:00 PM Location: Condeco Fredsgatan. I'll have a stack of three books on my table. Coordinates: 9F9HPX4C+39G Event link(s): LessWrong, Facebook event STOCKHOLM, SWEDEN Contact: Sal, niktonick[at]gmail[dot]com, Telegram Time: Sunday, September 25, 3:00 PM Location: Humlegården, Karlavägen. We will meet near blue gazebo, I will have 'ACX meetup' sign. Coordinates: 9FFW83RF+3M5 Group info: Facebook group BERN, SWITZERLAND Contact: Daniel, dd14214+acx[at]gmail[dot]com Time: Sunday, October 2, 4:00 PM Location: Grosse Schanze, at the statue in front of the main uni building, heading to the Pittaria if it's cold or raining Coordinates: 8FR9XC2Q+4G Event link(s): LessWrong GENEVA, SWITZERLAND Contact: Eric, eric[dot]c[dot]p[dot]meier[at]gmail[dot]com Time: Sunday, September 11, 4:00 PM Location: Park de la Grange, just towards the lake below Villa de la grange Coordinates: 8FR86548+J4 Event link(s): LessWrong Group info: We have a small persistent group who has tried to meet up once a month since last years Meetup. Notes: Feel free to bring other people you think would be interested! ZURICH, SWITZERLAND Contact: MB, acxzurich[at]proton[dot]me Time: Saturday, September 24, 3:00 PM Location: TBD Event link(s): LessWrong ISTANBUL, TURKEY Contact: J, jinai[dot]jyap[at]gmail[dot]com Time: Sunday, September 25, 4:00 PM Location: The House Cafe in Ortaköy. I am a young Asian woman and imagine I'll be easy to spot, but will also try to bring a sign with ACX MEETUP on it. Coordinates: 8GHF22XG+23P Event link(s): LessWrong, Partiful Group info: I do not live here; I am just digital nomading for an indefinite amount of time and would like to meet anyone who's here! Notes: Please RSVP via the Partiful link (you can RSVP as a Maybe)! BIRMINGHAM, UK Contact: Thomas Read, thomas[dot]read[dot]acx[at]gmail[dot]com Time: Saturday, September 3, 1:00 PM Location: We'll be at The Wellington, 37 Bennetts Hill, on the roof terrace if possible. I'll wear an orange shirt and have a sign saying ACX on the table. Coordinates: 9C4WF3JX+7Q Event link(s): LessWrong Notes: It's only a few minutes walk from the stations, so hopefully people can join from all over the West Midlands! BRIGHTON, UK Contact: Alan Enright, alanenright[at]protonmail[dot]com Time: Saturday, September 10, 11:00 AM Location: We'll be at the Alcampo Lounge on London Road—we will try and get a table on the raised area in front of you and to the left as you come in but will also have a little ACX sign. Coordinates: 9C2XRVM6+3X Event link(s): LessWrong, Meetup.com BRISTOL, UK Contact: Nick Lowry, bristoleffectivealtruism[at]gmail[dot]com Time: Saturday, September 24, 2:00 PM Location: We’ll be meeting at entrance closet to Tesco Express in the Galleries, Bristol City Centre Coordinates: 9C3VFC45+RJM Event link(s): LessWrong, Facebook event, Meetup.com Group info: Meet twice monthly for socials, more regular 'productive' meetups. Been active for 3+ years, please message for WhatsApp group CAMBRIDGE, UK Contact: Hamish Todd, hamish[dot]todd1[at]gmail[dot]com Time: Saturday, September 17, 2:00 PM Location: Bath House Pub, UPSTAIRS!! I will have a copy of Peter Singer's The Most Good You Can Do Coordinates: 9F426439+J9 Event link(s): LessWrong, Facebook event Group info: We meet on the third Saturday of every month. The group has been around almost a year and is well-attended! Notes: My phone/WhatsApp number is +44 0730 *** 3550, where the *** are replaced by the serial number of the Boeing plane whose first flight was on September 2, 1998. Email me to get on the mailing list for future events if you'd like that :) CARDIFF, WALES Contact: AF, strmnova[at]gmail[dot]com Time: Friday, September 16, 5:00 PM Location: Little Man Coffee (note new location!) Coordinates: 9C3RFRHH+W2 Event link(s): LessWrong EDINBURGH, SCOTLAND, UK Contact: Sam, acxedinburgh[at]gmail[dot]com Time: Saturday, September 24, 2:00 PM Location: Pleasance Cafe. Go through the arch and the door to the cafe is on your left Coordinates: 9C7RWRW9+M8 Group info: ~Monthly meetups, often in Pleasance Cafe but have experimented with other locations. Email me to join the mailing list & WhatsApp group. LANCASTER, UK Contact: Gruffydd Gozali, gruffyddgozali[at]gmail[dot]com Time: Saturday, October 15, 3:00 PM Location: Lancaster University Library, will be on the ground floor by the tree wearing an EA shirt. Coordinates: 9C6V2657+WJR Event link(s): LessWrong LINCOLN, UK Contact: Tobias, tobias[dot]showan[at]yahoo[dot]co[dot]uk Time: Saturday, September 10, 2:00 PM Location: Nosey Parker pub, I'll bring a little paper ACX sign. Coordinates: 9C5X6C9R+XJ Event link(s): LessWrong LONDON, UK Contact: Edward Saperia, edsaperia[at]gmail[dot]com Time: Sunday, September 25, 2:00 PM Location: Newspeak House Coordinates: 9C3XGWGH+3F7 Event link(s): LessWrong, Facebook event, Meetup.com, Eventbrite Group info: You can join our mailing list or our Meetup.com group MANCHESTER, UK Contact: Matthew Gibson, melkartmtg[at]hotmail[dot]com Time: Sunday, September 18, 11:00 AM Location: Sackville Gardens, Alan Turing Memorial Coordinates: 9C5VFQG7+MH Event link(s): LessWrong NEWCASTLE UPON TYNE, UK Contact: Joshua William, iamjoshwilliam[at]icloud[dot]com, Telegram Time: Saturday, September 3, 12:30 PM Location: Trinity Square, High Street Gosforth. You can get the bus to Gosforth from the city center just outside the famous 'Tyneside Cinema' (bus number: 30, 31, or 35 at Monument Pilgrim Street bus stop), or you can take a walk if you want to get your 'steps' in (if you'd like to do the latter, send me an email and I'll send you the directions), which takes ~60-min. Coordinates: 9C7W294H+5V Event link(s): LessWrong Group info: To my knowledge, there isn't an ACX meet up in this city, or region of the UK, though if there is a demand for a reoccurrence, I'd be happy to keep facilitating such. I'd also happily formulate a WhatsApp group if theres interest, after the meet up. Notes: We have a deli, '1901 cafe', on the square, which we can grab an immediate bite to eat at [so save some hunger if you'd like to do that]. There's a safe [and lovely] park with some benches just by the way, which, if the weather is nice, we can sit at after a bite to eat, or, otherwise, we can remain in the cafe. OXFORD, UK Contact: Sam, ssc[at]sambrown[dot]eu, There's a Signal group people can join :) contact Sam for info Time: Wednesday, October 19, 6:30 PM Location: The Star, Rectory Road, Oxford. We'll be in the beer garden round the back, with a sign ?? Coordinates: 9C3WPQX6+QP9 Event link(s): LessWrong, Facebook event, Meetup.com Group info: We run socials every months, and applied rationality workshops from time to time! Notes: Please RSVP on any of the platforms (or email) for free pizza PENRYN, CORNWALL, UK Contact: mini t, tminns[at]btinternet[dot]com Time: Saturday, August 27, 3:00 PM Location: glasney playing field and valley Coordinates: 9C2P5V8V+P9 Event link(s): LessWrong Notes: I don't mind rescheduling, or organizing another event, not many people are likely to turn up this far out of the way.
Inline links: 8FWR693H+GP2, LessWrong, Facebook group, 9F26RCWC+84, LessWrong, 8GJ5M8GW+J9, LessWrong, 8FQQRX38+V6W, LessWrong, 8G6MM3M3+Q6, LessWrong, 9F2P3CRW+FP7, LessWrong, Facebook event, 9F7JMH38+GFP, LessWrong, Facebook event, Meetup.com, 9GF6CPRH+MQ, LessWrong, 9GG65WMJ+2J, LessWrong, LessWrong group, 8FW4CP32+J8, LessWrong, Discord, matrix server, 8FW4V86J+GH, LessWrong, 8FM3HCQW+9H, LessWrong, https://twitter.com/lakesare, 8HH6MRQ2+WH, LessWrong, 9F28Q3HJ+9Q, LessWrong, here, 9F4MG9H4+4X, LessWrong, Google Calendar, 9F28WRMX+96H, LessWrong, 8FV9XVV2+V56, LessWrong, Meetup.com, Website, an Open Street Map link, 9F5FHX4H+RXC, LessWrong, LessWrong, 8FXC2C72+85X, LessWrong, our LessWrong page, 9F3F8F6X+R6, LessWrong, Telegram group, 9F3J8CM2+PF, LessWrong, 8FWFG3H5+XR, 8FWFG3H5+XR, LessWrong, 8G95WMQR+WRP, LessWrong, Meetup.com, 8FVXG2CW+2H, LessWrong, 9C3HVGQ7+JQ, LessWrong, LessWrong profile, 9C5M8PRP+JV, LessWrong, LessWrong, LW profile, Telegram, 8FJJXP22+HC, LessWrong, 8FQFF6C4+9C, LessWrong, 8FQH9VXG+9J, LessWrong, 8FMGPC92+R44, LessWrong, Facebook, 8FHJVHP9+8F, LessWrong, 9G86X426+Q5Q, LessWrong, 9F469V89+W4, LessWrong, Rationality NL Discord server, 9F4629FG+66, LessWrong, 9F48F378+PR, LessWrong, Facebook event, 9F37FMC5+VR, LessWrong, 9F4638J3+GP, LessWrong, Facebook event, 9FFGWPH7+QP, LessWrong, Meetup.com, 9F6W9JJ4+JW, LessWrong, 9F2X2WVX+V2, LessWrong, Facebook event, our Facebook group, 9G346HX8+FX, LessWrong, 9F4RCW5P+X3F, LessWrong, 9G4362G8+2V, LessWrong, Meetup.com, Facebook group, Meetup.com, 8CCGPRJW+V8, LessWrong, 8GP8C2HM+9X, LessWrong, 8GR5QH8F+MW, LessWrong, 8GP2RCP7+G7, LessWrong, 8FWV44X9+XW8, LessWrong, 8FRP3F3X+6V, LessWrong, Meetup.com, 8FH495QP+96, LessWrong, 8CGRC897+F8C, LessWrong, 8C9P92F6+3RG, LessWrong, 9F9HPX4C+39G, LessWrong, Facebook event, Telegram, 9FFW83RF+3M5, Facebook group, 8FR9XC2Q+4G, LessWrong, 8FR86548+J4, LessWrong, LessWrong, 8GHF22XG+23P, LessWrong, Partiful, 9C4WF3JX+7Q, LessWrong, 9C2XRVM6+3X, LessWrong, Meetup.com, 9C3VFC45+RJM, LessWrong, Facebook event, Meetup.com, 9F426439+J9, LessWrong, Facebook event, 9C3RFRHH+W2, LessWrong, 9C7RWRW9+M8, 9C6V2657+WJR, LessWrong, 9C5X6C9R+XJ, LessWrong, 9C3XGWGH+3F7, LessWrong, Facebook event, Meetup.com, Eventbrite, our mailing list, Meetup.com group, 9C5VFQG7+MH, LessWrong, Telegram, Monument Pilgrim Street bus stop, 9C7W294H+5V, LessWrong, 9C3WPQX6+QP9, LessWrong, Facebook event, Meetup.com, 9C2P5V8V+P9, LessWrong
Meetups Everywhere 2023: Times & Places
August 25, 2023 · Original source
BUDAPEST, HUNGARY Contact: Timothy Contact Info: Timunderwood9[at]gmail[dot]com Time: Sunday, September 10th, 2:00 PM Location: Northeast corner of the Museum Kért, near Kálvin. I'll bring a big purple book by Richard Dawkins, and someone might set up a sign.. If it rains we'll move to Lumen, a nearby cafe. Coordinates: https://plus.codes/8FVXF3R7+R8 Group Link: https://groups.google.com/g/rationality-budapest/members
Inline links: https://plus.codes/8FVXF3R7+R8, https://groups.google.com/g/rationality-budapest/members
Missing Heritability: Much More Than You Wanted To Know
June 26, 2025 · Original source
For example, educational attainment is 50% uncorrelated with direct genetic effects. You need to square this to figure out what percent is causal; when you do that, you find that the polygenic score that explained 14% of EA is only 4%pp direct genes, with the other 10%pp being nondirect5 confounders. So yes, it seems like most polygenic scores that don’t validate within families are confounded. However unhappy we previously were that we had only found 14% of genes for EA (vs. 40% expected), we should now be much more unhappy - we really only know 4% of genes that directly cause EA. On the other hand, you might say - so before we only knew 14%pp out of 40%. Now we only know 4%pp out of 40%. This is discouraging, but it doesn’t fundamentally change what we know about nature vs. nurture. Both 4%pp and 14%pp are less than 40% - with either number, we must be missing something or doing something wrong. Probably that’s insufficient sample size. We’ll keep working on sample size and other things, and eventually scrounge up the missing 26%pp or 36%pp or whatever of the variance, so this doesn’t change anything. All it means is that one predictive method that the average person never knew about in the first place doesn’t work as well as we thought. Who cares? Not doctors. So far this research has only just barely begun to reach the clinic. But also, all doctors want to do is predict things (like heart attack risk). They don’t care if they use causal vs. nondirect genes. It doesn’t matter if you’re “only” at higher risk of heart attack because you’re black, or Norman, or because your parents read books to you - you still need more heart attack medication! Polygenic embryo selection companies should care. They offer polygenic scores that can be used to select healthier or smarter embryos. If the predictors they use rely partly on variants that aren’t causal within families, their real benefits could be far lower than advertised. I talked to one of these companies, who said they’d already adjusted for these effects and expected their competitors had too - the proper antidote to this problem, sibling controls, is a natural choice when you’re literally picking between siblings. The biggest losers are the epidemiologists. They had started using polygenic predictors as a novel randomization method; suppose, for example, you wanted to study whether smoking causes Alzheimers. If you just checked how many smokers vs. nonsmokers got Alzheimers, your result would be vulnerable to bias; maybe poor people smoke more and get more Alzheimers. But (they hoped) you might be able to check whether people with the genes for smoking get more Alzheimers. Poverty can’t make you have more or fewer genes! This was a neat idea, but if the polygenic predictors are wrong about which genes cause smoking and what effect size they have, then the less careful among these results will need to be re-examined. But the reason I spent so much time on the subject here is that this has confused a lot of people into thinking heritability itself was confounded and is actually just 4%. When I read my first few blog posts on these findings, I came away thinking they were claiming to have discredited twin studies and heritability. And although I take partial ownership of my own poor reading comprehension, I maintain that the way that the new anti-hereditarians discuss this is pretty bad. For example, Turkheimer’s treatment of the Tan study above is called Is Tan Et Al The End Of Social Science Genomics?, and includes passages like: The median [direct genomic effect] heritability for behavioral phenotypes is .048. Let that sink in for a second. How different would the modern history of behavior genetics be if back in the 80s one study after another had shown that the heritability of behavior was around .05? When Arthur Jensen wrote about IQ, he usually used a figure of .8 for the heritability of intelligence. I know that the relationship between twin heritabilities and SNP heritabilities is complicated, and in fact the DGE heritability of ability is one of the higher ones, at .2336. But still, it seems to me that the appropriate conclusion from these results is that among people who don’t have an identical twin, genomic information is a statistically non-zero but all in all relatively minor contributor to behavioral differences. And comments included things like: I don’t know if [this study] is the end of social science genomics, but it should certainly be the end of attributing significant genetic influence to behavioral traits (despite the recent scientist-generated cartoons touting genes for “income”). And: There's no doubt that this reported findings have dealt a fatal blow to my conviction that behavioral traits are pre-eminently heritable…This is a remarkable example of an objective statistical fact mercilessly crushing the more subjective experiential sense of "A looks and acts more like B than C because A and B have the same parents." This subjective evidence is almost unshakable and universal in its application as a tried and tested psychosocial heuristic. And yet, here we are. Turkheimer is either misstating the relationship between polygenic scores and narrow-sense heritability, or at least egging on some very confused people who are doing that, and the dynamic was bad enough that I got confused myself for a while. But even more confusing, the new anti-hereditarians actually are saying that lots of behavioral traits have very low heritability! But this point requires different arguments, only tangentially related to these. So let’s move on to… Is Heritability Genuinely Low? (Part 1: GWAS & GREML) In the mid 2010s, when genome-wide association studies (GWAS) based polygenic predictors were getting better every year, it was easy to hope they might reach 40% and close the “missing heritability”. But since then, progress has stalled. The second-to-last tripling of sample size, from 300K to 1M between 2016 - 2018, increased predictive power from 6% → 12%. The last tripling, from 1M to 3M between 2018 - 2022, only increased predictive power from 12% → 14%. If you graph sample size vs. predictive power, it looks like there's an asymptote between 15 - 20% or so. (of which - remember - only 5% is directly causal!) Worse, a mid-2010s technique called GREML allowed researchers to estimate the percent of variance in a trait that comes from the sorts of common genes studied in GWAS, without having to identify the genes involved. A 2016 GREML paper suggested that the maximum share of variance that GWASs of educational attainment could ever discover was about 21% (again, compared to 40% predicted genetic from twin studies). Since unavoidable methodological issues will prevent GWASs from reaching the literal maximum possible, this agrees with the evidence suggesting an asymptote between 15 - 20%. So either twin studies are wrong and traits are less heritable than believed, or the heritability must lie somewhere other than the common genes identifiable by GWAS. What about rare genes? GWASs focus on genetic variation common enough to be worth including in a basic genetic test. Most of this is single nucleotide polymorphisms (“SNPs”). A single nucleotide is one letter of DNA - for example, a C or a G. Polymorphisms are genes that commonly vary in humans - sometimes across races (for example, some humans have a gene for light skin, and other humans have a gene for dark skin), and other times within races (for example, some white people have a gene that makes cilantro taste like soap, and others don’t). So SNPs are single-letter spots in DNA where different people often have different letters. How often? Some people say 1%, but the more practical definition is “often enough that someone has noticed and added it to the test panel”. There are three billion letters in the genome, of which only a few million are commonly-tested SNPs. But these SNP studies have limited7 ability to measure personal mutations and rare variants. Sometimes your parents’ egg and sperm cells mess up copying a nucleotide of DNA, and you get a mutation that isn’t inherited from your ethnic group or even from your subgroup/family line - it’s just some idiosyncratic DNA change that you might be the first person in history to have. Since scientists have never seen this mutation before, they don’t know about it and can’t test for it without doing something more expensive than a simple SNP screen. And SNP studies have limited ability to detect anything more complicated than a single letter changing to another single letter. But some mutations are more complicated structural variants. For example, some bits of DNA get stuck on repeat - one person might have GATGAT, another person might have GATGATGATGAT, and a third person might have fifty GATs in a row. Other bits come out backwards. Sometimes a whole chunk of DNA goes missing, or moves to the wrong place. Occasionally a gene reads The Selfish Gene by Richard Dawkins, takes it too seriously, and evolves some ridiculous trick for spamming itself all over the genome. So if even the best molecular studies seem to be asymptoting around 15-20% of variance in educational attainment, but twin studies suggest it’s 40% genetic, might rare variants and structural variants make up the missing 20-25%pp? This remains a topic of bitter disagreement. On the one side, hereditarians bring up a Darwinian argument: imagine a genetic engineer who hopes to find the genes for educational attainment and edit them to make everyone smart and successful. She looks harder and harder, becoming more and more exasperated as they fail to materialize. Finally, she realizes she’s been scooped: evolution has been working on the same project, and has a 100,000 year head start. In the context of intense, recent selection for intelligence, we should expect evolution to have already found (and eliminated) the most straightforward, easy-to-find genes for low intelligence. Therefore, everything left should be convoluted or hidden or impossible to work with. So although this requires a sort of god-of-the-gaps argument - where we keep pushing heritability into whatever genes are too weird for existing techniques to detect - there are some reasons to think God really is in the gaps here. And a 2017 paper uses some clever techniques to estimate the share of intelligence variation lurking in hard-to-measure genes and finds it’s more than half: “By capturing these additional genetic effects, our models closely approximate the heritability estimates from twin studies for intelligence and education.” (see also Wainschtein 2022, Sidorenko 2024) The anti-hereditarians disagree. They cite papers like Zeng which measure the strength of selection on intelligence and suggest that it’s too weak to concentrate so much of the variation in rare genes8. And Sasha Gusev mentions Weiner 2023, which finds that in fact rare variants “explain 1.3% (SE = 0.03%) of phenotypic variance on average – much less than common variants” (other experts say that burden heritability only captures some rare variants and is not the right tool for this problem). But it may not even matter, because another set of findings suggests that heritability is genuinely low even when the rare variants are counted. Is Heritability Genuinely Low? (Part 2: Sib-Regression and RDR) Two newer methods, Sib-Regression and RDR, ask: using what we know from genetic studies, how much genetic variation do we think exists, total, across both common and rare genes? On average siblings share 50% of genes. But there’s a little randomness in meiosis, so some siblings might share 40% and others might share 60%. The more genetic influence on a trait, the more similar sibling pairs who share 60% of their genes will be, compared to sibling pairs who only share 40% of their genes. Since 60%-gene siblings and 40%-gene siblings are both equally part of the same family, you can use these numbers to calculate heritability unconfounded by a range of family factors. This is Sib-Regression. If you do a more complicated statistical process to extend the same idea to relatives other than siblings, it’s relatedness disequilibrium regression or RDR. GWAS asks: Looking at common easy-to-study genes, how much variation in a trait have we explained right now? GREML asks: looking at common easy-to-study genes, how much variation could we ever explain? But sib-regression and RDR ask a question more like twin studies: considering all genes, whether common / rare / easy-to-study / hard-to-study, how much variation is there total? This could address the rare variant objection mentioned above. And in many ways, these techniques are better than twin studies - Sib-Regression eliminates many potential biases, and RDR eliminates even more (although it’s harder to pull off, requiring more genetic information and computational resources). These techniques are new and hard-to-use, and only a few published studies have applied them to the sorts of behavioral traits we’re interested in: Young et al (2018) did Sib-Regression and RDR to genetic data from Iceland. Sib-regression found educational attainment = 40% (±15%) heritable, and RDR found 17% (±9%) heritable. Kemper et al (2021) did Sib-Regression only to genetic data from Britain. It found educational attainment = 14% heritable. This number conflicts with the 40% from the Young paper. Why? Unclear, but it could be selection bias - Young’s Icelandic sample was representative of the country; Kemper’s British population were Biobank volunteers who tend tend to be healthier and higher-class than the population at large. Upper-class people may have restricted range in educational attainment, or different factors affecting their educational attainment compared to the overall population. Either way, these are closer to the low estimates from GWAS and GREML (7% direct, 20% total), than to the higher estimates from twin studies (40%, generally presumed direct). And we can no longer use contributions from rare variants to paper over the difference. So what is going on? It seems like we have to accept one of three possibilities: Either something is wrong with twin studies. Or something is wrong with Sib-Regression and RDR (and then we can explain away GWAS and GREML by saying they’re missing rare variants). Or something is wrong with how we’re thinking about this topic and comparing things. What’s Going On? (Part 1: Is Something Wrong With Twin Studies?) Twin studies have dominated discussion of behavioral genetics for decades, so there’s a vast literature investigating their various assumptions and whether something might be wrong with them. Here are some of the assumptions and what the research says about each. Some of these will be duplicates of the GWAS confounders above, but we’ll go through them again anyway to review how they apply to twins. 1: Parents Treat Fraternal And Identical Twins The Same: Twin studies claim that twins are a uniquely powerful genetic laboratory; both fraternal and identical twin pairs have equally concordant environments, but identical twins have more concordant genes. Therefore, the more similar identical twin pairs are relative to fraternal twin pairs, the more heritable a trait must be. But this conclusion falls apart if identical twin pairs actually have more similar environments than fraternal twin pairs do, maybe because parents (knowing their twins are identical) treat them more similarly than they would fraternal twins. Would-be twin-study-discreditors have been trying to argue that this must be true for decades, but it’s always been a kind of quixotic battle. Remember, twin studies find many behavioral traits like IQ are >60% heritable, so you would need to prove not only that parents treat identical twin pairs differently from fraternal, but that this was an overwhelming effect. Parents of identical twins would have to obsessively expose them to the exact same stimuli in the exact same order; parents of fraternal twins would have to send one to the Gifted Advanced Placement Acceleration program while locking the other in a box and force-feeding them lead pellets. Common sense tells us there are no such differences, and studies confirm this: when parents are wrong about their twins’ status (eg they have fraternal twins, but falsely think they’re identical, or vice versa) their trait similarity matches their real status, rather than the incorrect status that determined how their parents treat them; parental treatment explains less than 1% of why identical twin pairs are more concordant (2, 3, 4). See also Felson 2013, which tries to measure environmental similarity and adjust for it, with minimal effects. Are these two cuties monozygotic or dizygotic? Are you sure? (answer) 2: Fraternal And Identical Twins Have Equally Concordant Uterine Environments: Fraternal twins have different sacs in the uterus and use different placentas. Most identical twins share a placenta, and some share an amniotic sac. If trait similarity is caused by sharing a placenta or sac (maybe because the placenta is defective, the fetal brain is starved of nutrients, and so the person has a lower IQ when they grow up), twin studies would falsely read this identical-fraternal difference as genetic. Luckily this is easy to study; not all identical twins share a placenta or sac, so you can cleanly separate the effect of uterine environment from genetics. If you measure enough traits, you can find small deviations in some, but it’s not clear whether this is just multiple testing, and in any case the deviations are small. The best studies suggest this chips off somewhere between 0 - 3% from heritability estimates9. 3: There is little assortative mating: We discussed this one above in the earlier section on GWAS - smart/pretty/kind/whatever people tend to marry other smart/pretty/kind/whatever people. Why would this bias twin study results? Identical twins share 100% of their genes. Fraternal twins ought to share 50% of their genes - but they get half their genes from their mother, and half from their father. In the degenerate case where the mother and father have exactly the same genes (“would you have sex with your clone?”) even fraternal twins will be extremely similar (although not quite identical, since they’ll get different alleles from each clone). In the more plausible case where mothers and fathers are just a little more alike than chance (eg because smart people tend to marry other smart people), fraternal twins will share a genetic tendency towards a trait somewhat more than their 50% shared genes suggest. Since this makes fraternal twin pairs more (genetically) like identical twin pairs, and twin studies assess heritability as the difference in fraternal-identical-twin-pair concordance, this bias would make twin studies underestimate heritability. But this is the opposite of what you would need to “discredit” twin studies - if this bias is true, then everything is more genetic than twin studies think. And unlike the previous two biases, this one seems real and important, so much so that when you adjust for it, the heritability of educational attainment rises from ~40% to ~50%. I’m only mentioning this one here because some anti-hereditarians argue that you can’t trust twin studies because of assortative mating, without mentioning that this can only bias them down. 4: Population stratification: This is often large and worth worrying about, but it applies to identical and fraternal twin pairs equally, and doesn’t bias twin study heritability estimates much (though it might shift the balance between shared and non-shared environment). See eg the sentence around footnote 30 here. 5: Non-additive / “interaction” effects: These are theoretically interesting, but all research thus far has found they are minimal (1, 2). Some experts think this may miss rarer or harder-to-find interactions; we’ll return to this later. 6: “Genetic nurture”, parent-to-child Mentioned above: if there is a gene for reading books to kids, and reading books raises IQ, it will look like a “gene for IQ”. This isn’t as relevant to twin study estimates of heritability, since both identical twins and fraternal twins are equally related to their parents, and any trait caused by genetic nurture wouldn’t differ between them (and therefore would not falsely appear heritable in this design). Rather, they would appear as shared environment. 7: “Genetic nurture”, sibling-to-sibling That is, suppose your sibling’s traits influence your own development. For example, suppose your sibling has a gene that makes them sabotage your schoolwork, causing you to fail and drop out of school early. An identical twin would share this gene with their sibling more often than a fraternal twin, making it look like a “gene for doing badly at school” (since the people who have it do worse at school than those who don’t). Why are we even talking about this? Do we really think it’s a big part of the variance in behavioral traits? Challenging twin study heritability estimates through this route requires inhabiting a weird no-man’s-land where otherwise-invisible genetic and environmental pathways suddenly flare up when you say the magic words “it was done by a sibling”. For example, this requires a strong effect of shared environment - that is, your educational attainment has to depend on whether you’re being sabotaged or not. But in general, shared environmental effects are weak. And it requires a strong effect of genes - that is, this mechanism only works if your sibling’s tendency to sabotage you is highly genetically determined. But we’re deploying this claim to deny that traits like IQ or educational attainment are highly genetically determined. So to get much out of this, the tendency to sabotage siblings would have to be more genetic than other behavioral traits! The reason this convoluted possibility gets brought up so often is that, unlike the more plausible parent-to-child genetic nurture, twin studies can’t rule it out. So if you really want to deny twin studies, this is one of your best bets. But when investigated, this has effects indistinguishable from zero. I’ve been a bit mean in this whole section, because people really like to dismiss twin studies as “Oh, don’t you know, those depend on assumptions, I bet you never considered that assumptions might be wrong”, and then Gish Gallop you with different assumptions until you give up. But scientists have actually done a lot of really good work checking the assumptions and they mostly hold. An alternative way of validating twin studies (brought up by Noah Carl in this article) is to check them against their close cousins, adoption studies and pedigree studies. Pedigree studies investigate large family trees, and check how trait similarity decreases with genetic distance. They avoid twin specific biases (like different treatment of fraternal vs. identical twin pairs, or different prenatal environments), while adding others like assortative mating. Here are the heritabilities of IQ and EA found in pedigree studies10 (see footnote for sources and caveats, and see also here and here for somewhat similar designs): Adoption studies investigate whether adoptees’ traits are more correlated with their adoptive or biological parents. They avoid a large swathe of biases, at the risk of introducing new adoption-related biases of their own (like the possibility that agencies deliberately place adoptive children with parents who are culturally or behaviorally similar, or the possibility that adoptees were adopted late enough to still get some shared environment from their biological parents). Here are the findings of some of the largest and best11: Both straightforwardly confirmed the larger heritability numbers found in twin studies. I would add the evidence from some less formal “adoption studies”12. During residency, I spent a few months working in a child psychiatric hospital for the worst of the worst - kids who committed murder or rape or something before age 18. Many of these children had similar stories: they were taken from their parents just after birth because the parents were criminals/drug addicts/in jail/abusing them. Then they were adopted out to some extremely nice Christian family whose church told them that God wanted them to help poor little children in need. Then they promptly proceeded to commit crime / get addicted to drugs / go to jail / abuse people, all while those families’ biological children were goody-goodies who never got so much as a school detention. When I met with the families, they would always be surprised that things had gone so badly, insisting that they’d raised them exactly like their own son/daughter and taught them good Christian morals. I had to resist the urge to shove a pile of twin studies in their face. This has left me convinced that behavioral traits are highly heritable to a level that it would be hard for any study to contradict. Ultimate source here. Although the study is confusing about this, I think it’s trying to say that almost 90% of subjects were adopted before age 2. But I don’t think studies do contradict this. Given the degree to which their assumptions have been validated, and the level of confirmation from pedigree and adoption studies, I think they have earned a presumption of accuracy. Doubting the twin studies doesn’t seem like a promising route to reconciling the twin-vs-Sib-Regression/RDR discrepancy. What’s Going On? (Part 2: Is Something Wrong With Sib-Regression And RDR?) Sib-Regression is a clever way of avoiding most biases. Its independent variable - the degree to which some sibling pairs end up with slightly more shared genes than others - is even more random and exogenous than the difference between fraternal and identical twins. It can sometimes have biases related to assortative mating (which would falsely push heritability down), but otherwise it’s pretty good. RDR has many of the same advantages, and allows more diverse relationships and so larger sample sizes. It’s hard to think of ways these methods could be wildly off. There is one caveat: although RDR includes most of the rare and structural variants missed by GWAS, in theory it can miss certain ultra-rare variants which are so uncommon that they aren’t shared between some of the relative pairs used in RDR. De novo variants that occurred during the subject’s own conception would be in this category, if the subject didn’t have children or didn’t pass on that gene13. This seems like a pretty small subcategory of genetic variation, and I wouldn’t normally expect that much of importance to be hiding here, but maybe it’s more important than it seems. RDR also doesn’t include much variance caused by statistical interactions between genes. Although we said above that these are usually found to be insignificant, they might be more important in a trait like intelligence that has been under recent evolutionary selection that lops off easily-detectable sources of variance and leaves only the weird obscure ones behind. There’s limited ability for classical Mendelian dominance to affect common variants, but more complicated genetic interactions might still prove important. Overall these are strong methods, and their failure to converge is troubling. If forced to explain them away, we might tell a story like: So far, there is only one RDR study and a few Sib-Regression studies, so we should wait for more data before updating too hard.
Inline links: 5, Polygenic embryo selection, need, Is Tan Et Al The End Of Social Science Genomics?, 6, like, And, 300K, 1M, 3M, A 2016 GREML paper, 7, evolves some ridiculous trick, a Darwinian argument, a 2017 paper, Wainschtein 2022, Sidorenko 2024, Zeng, 8, Weiner 2023, other experts say, meiosis, Young et al (2018), Kemper et al (2021), their trait similarity, matches their real status, 2, 3, 4, Felson 2013, https://substackcdn.com/image/fetch/$s_!r3kV!,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fd575f2d6-3619-40e6-9a5e-f9f1ec1399a5_650x422.png, answer, The best studies, 9, seems real and important, here, 1, 2, when investigated, in this article, 10, here, here, https://substackcdn.com/image/fetch/$s_!b3LF!,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fc094f9c0-4c71-48cf-89dc-615498d94812_483x51.png, 11, https://substackcdn.com/image/fetch/$s_!XFWU!,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F85f433e5-d141-47b7-8dc5-2271925032e9_483x102.png, 12, https://x.com/cremieuxrecueil/status/1935731422205010135, here, 13