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45 posts found
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Dec 19, 2025
acx
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17 min 2,631 words 1,074 comments 666 likes podcast (16 min)
Scott argues against the trend of 'Boomer-hating,' contending that Baby Boomers delivered peace and prosperity, passed on greater wealth to their children, and don't differ significantly from younger generations on most political issues. Longer summary
Scott Alexander pushes back against the growing anti-Boomer sentiment in contemporary discourse. He argues that despite popular narratives, Baby Boomers presided over an era of unprecedented peace and prosperity, and younger generations actually have more inflation-adjusted wealth than Boomers did at the same age. He examines claims that Boomers are politically extreme (both left and right), finding minimal generational differences on issues like climate change, nuclear power, and housing policy. Scott addresses the accusation that Boomers are plundering younger generations through Social Security, showing that benefit generosity peaked in 1972 and has since contracted. He concludes by warning that generational identity politics, like other forms of identity politics, provides a lazy way to hate everything while avoiding substantive policy discussion, and that today's young people will eventually face similar resentment from future generations. Shorter summary
Jun 27, 2025
acx
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121 min 18,662 words 686 comments 714 likes podcast (109 min)
A parent details their year-long experience with Alpha School in Austin, examining how this innovative program achieves accelerated learning through a combination of technology, personalized instruction, and incentive systems. Longer summary
This extensive review details the author's year-long experience with Alpha School, an innovative educational program in Austin that claims to achieve accelerated learning through a '2-hour learning' platform, analyzing its history, methods, effectiveness, and potential for scaling. The author explores how Alpha combines technology, personalized learning, incentive systems, and afternoon workshops to achieve its results, while also examining the challenges it faces in scaling beyond its current elite private school model. The review is particularly careful to separate marketing claims from reality, showing that while the '2-hour learning' actually takes closer to three hours and isn't truly AI-powered, the program does achieve remarkable results through a combination of proven educational techniques. Shorter summary
Jul 24, 2024
acx
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21 min 3,173 words 934 comments 180 likes podcast (20 min)
Scott Alexander presents a diverse collection of 41 links and news items, covering topics from science and politics to history and technology, with brief commentaries and insights. Longer summary
This post is a collection of 41 diverse links and news items covering a wide range of topics. The items include scientific studies, political developments, historical anecdotes, technological advancements, and cultural phenomena. Scott Alexander presents these with brief commentaries, often adding his own insights or expressing skepticism about certain claims. The tone is informative and occasionally humorous, with Scott pointing out interesting connections or implications of the information presented. Shorter summary
Jul 19, 2024
acx
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76 min 11,773 words 645 comments 242 likes podcast (79 min)
The review examines Daniel Everett's 'How Language Began', which challenges Chomsky's linguistic theories and proposes an alternative view of language as a gradual cultural invention. Longer summary
This book review discusses Daniel Everett's 'How Language Began', which challenges Noam Chomsky's dominant theories in linguistics. Everett argues that language emerged gradually over a long period, is primarily for communication, and is not innate but a cultural invention. The review contrasts Everett's views with Chomsky's, detailing Everett's research with the Pirahã people and his alternative theory of language origins. It also touches on the controversy Everett's work has sparked in linguistics and its potential implications for understanding language and AI. Shorter summary
Apr 24, 2024
acx
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51 min 7,819 words 492 comments 165 likes podcast (44 min)
Scott Alexander challenges Robin Hanson's claim that medicine doesn't work by analyzing health insurance studies and presenting evidence of medicine's effectiveness. Longer summary
Scott Alexander critiques Robin Hanson's claim that medicine doesn't work, analyzing three major health insurance experiments (RAND, Oregon, and Karnataka) and other studies. He argues that these studies are underpowered to detect medication effects and don't support Hanson's conclusion, citing evidence of medicine's effectiveness in improving survival rates for various diseases. Shorter summary
Nov 03, 2023
acx
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27 min 4,106 words 537 comments 127 likes podcast (23 min)
Scott Alexander proposes various project ideas for ACX Grants, ranging from scientific research to social initiatives, and encourages readers to pursue them. Longer summary
Scott Alexander proposes several project ideas for the upcoming ACX Grants round. These range from replicating brain entrainment learning results to creating an open-source polygenic score for educational attainment. Other suggestions include campaigns similar to John Green's anti-tuberculosis effort, a novel approach to language teaching, an automatic Implicit Association Test generator, a new dating site concept, a foundation to promote classical art and architecture, and a primer on political change. Scott encourages readers to take on these projects, offering potential publicity and connections to funders. Shorter summary
Aug 31, 2023
acx
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23 min 3,462 words 706 comments 280 likes podcast (21 min)
Scott Alexander defends the concept of automaticity in psychology, arguing that core cognitive biases and priming effects are real, while acknowledging some claims have been overstated. Longer summary
Scott Alexander responds to a critique of automaticity in psychology, arguing that while some claims about cognitive biases and priming have been overstated, the core concepts are real and well-replicated. He provides examples of cognitive biases, priming effects, and nudges that have strong evidence behind them. Scott compares cognitive biases to optical illusions - real phenomena that affect our perception, but not in ways that make us completely helpless. He argues that automaticity is actually a very old idea about human nature, found in various philosophical and religious traditions. While we shouldn't see ourselves as completely controlled by unconscious forces, Scott suggests that accepting some level of automaticity in our cognition is both realistic and not necessarily problematic. Shorter summary
Aug 25, 2023
acx
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37 min 5,661 words 330 comments 131 likes podcast (34 min)
A critical review of 'Why Nations Fail' that examines the authors' academic work and methodology, while questioning the book's quality and practical implications. Longer summary
This review critiques 'Why Nations Fail' by Acemoglu and Robinson (AR), arguing that while the book itself is not very good, AR's academic papers present a more compelling case for their thesis that political institutions are the main determinant of economic growth. The reviewer explains AR's methodology using instrumental variables, discusses their evidence and criticisms, and ultimately concludes that even if AR are correct, their extremely long-run focus may not be very useful for practical policymaking or development efforts. Shorter summary
Aug 11, 2023
acx
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35 min 5,420 words 281 comments 140 likes podcast (31 min)
A review of Joe Henrich's 'The Weirdest People in the World', examining its argument that the Western Church's marriage regulations led to WEIRD psychology and modern economic growth. Longer summary
This book review examines Joe Henrich's 'The Weirdest People in the World', which argues that the Western Church's Marriage and Family Program (MFP) dismantled intensive kinship networks, leading to WEIRD (Western, Educated, Industrialized, Rich, and Democratic) psychology and modern economic growth. The reviewer discusses the book's scientific approach to European history, its extensive coverage of various topics, and raises questions about the intentionality of historical actors and the future implications of WEIRD psychology. Shorter summary
Apr 20, 2023
acx
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25 min 3,799 words 706 comments 115 likes podcast (23 min)
Scott Alexander shares a diverse collection of interesting links and news items for April 2023, covering topics from unusual stories and scientific research to AI developments and global trends. Longer summary
Scott Alexander presents a collection of interesting links and news items for April 2023. The post covers a wide range of topics, including unusual stories, scientific research, political developments, AI progress and concerns, cultural phenomena, and more. Notable items include a real-life 'Cocaine Bear' story, an adversarial collaboration on income and happiness, concerns about AI development, and updates on global trends like birth rates in Africa. The post also includes several short fiction recommendations and humorous AI-related anecdotes. Shorter summary
Feb 17, 2023
acx
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31 min 4,739 words 225 comments 156 likes podcast (27 min)
Scott Alexander reviews the evidence for declining sperm counts, discussing major studies, criticisms, and potential causes, while remaining uncertain about the true extent and reasons for any decline. Longer summary
Scott Alexander examines the evidence for declining sperm counts worldwide, discussing the major studies, potential causes, and criticisms of the hypothesis. He explores the methodology of sperm count studies, regional variations, possible explanations like plastics and pesticides, and animal data. While acknowledging the noisy data and potential confounders, he concludes that there's suggestive evidence for a decline but remains uncertain about its magnitude and causes. Shorter summary
Jan 24, 2023
acx
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24 min 3,720 words 258 comments 101 likes podcast (23 min)
Scott Alexander analyzes results from a 2022 prediction contest, discussing top performers and methods for improving forecast accuracy. Longer summary
Scott Alexander reviews the results of a 2022 prediction contest where 508 participants assigned probabilities to 71 yes-or-no questions about future events. The post discusses the performance of individual forecasters, aggregation methods, and prediction markets. It highlights the success of superforecasters, the wisdom of crowds, and prediction markets. The article also announces winners, discusses demographic factors in forecasting ability, and introduces a new contest for 2023, emphasizing the potential for improving forecasting accuracy through various methods. Shorter summary
Dec 20, 2021
acx
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17 min 2,525 words 125 comments 41 likes podcast (23 min)
Scott Alexander reviews recent developments in prediction markets, including Google's internal market and Metaculus' 'fortified essays', while discussing challenges and applications in various fields. Longer summary
Scott Alexander discusses recent developments in prediction markets, including Google's internal prediction market Gleangen, challenges in long-term predictions, conditional markets for policy decisions, and new weight loss drugs. He also covers Metaculus' 'fortified essays' concept, which combines expert analysis with crowd forecasts, and shares recent predictions on topics like COVID-19 hospitalizations and SAT requirements in college admissions. Shorter summary
Oct 14, 2021
acx
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19 min 2,850 words 466 comments 64 likes podcast (24 min)
A compilation of 30 diverse links on various topics including science, history, technology, and culture, with brief commentaries by Scott Alexander. Longer summary
This post is a collection of 30 diverse links and brief discussions on various topics. It covers a wide range of subjects including scientific findings, historical anecdotes, technological developments, cultural phenomena, and current events. The post touches on topics such as oil spills, architecture, IQ research, chronic pain therapy, alcohol consumption, AI safety, and more. Scott Alexander provides short commentaries or explanations for each link, often adding his own insights or connecting the information to broader themes. Shorter summary
Aug 17, 2021
acx
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29 min 4,481 words 408 comments 107 likes podcast (29 min)
Scott Alexander argues that missing a year or two of school is unlikely to have significant long-term effects on children's education, presenting evidence and critiquing contrary studies. Longer summary
Scott Alexander argues that missing a year or two of school due to COVID-19 or other reasons is unlikely to have significant long-term effects on children's education. He presents evidence from various studies and experiments, such as the Benezet experiment, unschooling, and different countries' school hours, to support his claim. Scott also critiques studies that show negative effects of school absences, arguing they are often correlational and fail to account for confounders. He acknowledges some potential non-academic benefits of schooling and provides his confidence levels on various predictions about the effects of missing school. Shorter summary
Aug 09, 2021
acx
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8 min 1,161 words 232 comments 98 likes podcast (8 min)
Scott Alexander conducts an experiment playing a word game 800 times under varying CO2 levels, finding no correlation between indoor carbon dioxide and cognitive performance. Longer summary
Scott Alexander describes his experiment to test the effect of indoor carbon dioxide levels on cognitive performance. He played a word game called WordTwist 800 times over three months, recording his scores and the CO2 levels in his room. The CO2 levels ranged from 445 ppm to 3208 ppm. Scott found no correlation between CO2 levels and his game performance (r = 0.001, p = 0.97). He discusses potential confounding factors but argues that his results strongly suggest that CO2 levels don't affect his cognitive performance on this specific task. Scott encourages others to conduct similar experiments with different cognitive tasks and offers to provide CO2 monitors to interested researchers. Shorter summary
Aug 05, 2021
acx
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35 min 5,328 words 622 comments 273 likes podcast (34 min)
Scott Alexander argues that the FDA is too strict, not too lax, and proposes unbundling FDA approval to allow for more nuanced drug regulation. Longer summary
Scott Alexander criticizes an Atlantic article that argues for stricter FDA standards following the approval of aducanumab, an Alzheimer's drug with questionable efficacy. He contends that the FDA is already too strict, citing examples like the delayed approval of COVID-19 tests and vaccines. Scott argues that the FDA's excessive caution has likely cost many lives. He proposes unbundling FDA approval into separate decisions about legality, insurance coverage, and the FDA's endorsement level. This would allow for more nuanced approvals and potentially reduce costly mistakes while still permitting access to promising treatments. Shorter summary
Jun 23, 2021
acx
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23 min 3,442 words 649 comments 55 likes podcast (31 min)
Scott Alexander presents a monthly collection of 42 diverse links covering topics from science, politics, culture, and technology, highlighting interesting findings and current events. Longer summary
This post is a collection of 42 diverse links and topics, ranging from scientific studies to political news and cultural observations. Scott Alexander curates these links monthly, covering a wide array of subjects including zoology, sociology, economics, psychology, technology, and more. The links often highlight interesting or surprising findings, such as studies on cult demographics, obesity research controversies, and the effects of testosterone on belief in minority positions. Scott also includes humorous content, political commentary, and discussions on current events and social trends. Shorter summary
May 12, 2021
acx
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17 min 2,630 words 231 comments 128 likes podcast (18 min)
Scott Alexander criticizes the emergence of expensive, prescription-only therapy apps, using Somryst (a CBT-i app) as an example, and warns about the normalization of this trend. Longer summary
Scott Alexander discusses the emergence of prescription-only apps, focusing on Somryst, a CBT-i app for insomnia. He criticizes the high cost ($899) and prescription requirement, arguing that it defeats the purpose of making therapy more accessible. The post explains how the US healthcare system incentivizes this model, comparing it to prescription fish oil. Scott expresses disappointment in the lack of affordable alternatives and warns that this trend might become normalized, urging readers to act while they still feel outraged by it. Shorter summary
Jan 29, 2021
acx
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8 min 1,183 words 234 comments 110 likes podcast (22 min)
Glen Weyl responds to Scott Alexander's critique of his technocracy essay, clarifying his position and defending his arguments while acknowledging some limitations. Longer summary
Glen Weyl responds to Scott Alexander's critique of his essay on technocracy, clarifying his position and addressing several points of contention. Weyl acknowledges some limitations in his understanding of the rationalist community, provides context for his original piece, and defends his examples of technocratic failures. He argues for a more nuanced view of mechanism design and technology adoption, emphasizing the importance of public communication and collaboration in successful technological change. Shorter summary
Apr 17, 2020
ssc
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11 min 1,671 words 100 comments podcast (12 min)
Scott examines the bidirectional relationship between depression and sense of smell, exploring potential mechanisms and treatment implications. Longer summary
This post discusses the relationship between depression and olfactory function. It reviews studies showing that depressed people have a worse sense of smell, and people with impaired smell are more likely to be depressed. The post explores potential reasons for this connection, including depression's general effect on sensory acuity and the unique emotional salience of smell. It also discusses implications for depression treatment, including the effects of antidepressants on smell and potential olfactory-based therapies. The tone is analytical and somewhat humorous, with Scott critically examining various studies and hypotheses. Shorter summary
Aug 07, 2019
ssc
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53 min 8,109 words 450 comments podcast (55 min)
Scott Alexander responds to comments on billionaire philanthropy, addressing criticisms while ultimately defending its net positive impact and arguing to protect the most effective charitable efforts. Longer summary
Scott Alexander responds to comments on his previous post about billionaire philanthropy. He addresses criticisms and counterarguments, providing further analysis on topics like the scale of billionaire donations compared to political spending, the democratic nature of philanthropy, tax deductibility, and potential downsides. While acknowledging some valid concerns, Scott ultimately defends the net positive impact of billionaire philanthropy, especially highlighting examples like the Gates Foundation's global health work. He argues that even if some billionaire philanthropy is problematic, the most effective charitable efforts are so valuable that they should be protected and encouraged. Shorter summary
Apr 15, 2019
ssc
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68 min 10,519 words 363 comments podcast (69 min)
Scott Alexander examines the history of increasing competitiveness in college admissions, analyzing causes and questioning whether the focus on elite college admission is justified. Longer summary
Scott Alexander explores the history of college admissions and the increasing competitiveness in recent years. He traces the evolution from a time when top colleges admitted almost anyone qualified to the current highly competitive landscape. The post examines various factors contributing to this change, including increased applications per student, changing demographics, and shifts in evaluation criteria. Scott also investigates whether the intense focus on college admissions is justified, given research suggesting that attending a selective college may not significantly impact most students' long-term outcomes. Shorter summary
Nov 13, 2018
ssc
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35 min 5,299 words 164 comments podcast (38 min)
Scott Alexander critically examines studies on preschool effects, finding mixed and inconsistent evidence for long-term benefits. Longer summary
Scott Alexander reviews multiple studies on the long-term effects of preschool programs like Head Start. While early studies showed fade-out of test score gains, some found lasting benefits in adult outcomes. However, Scott finds inconsistencies between studies in which subgroups benefit and on which outcomes. He also notes concerns about potential p-hacking and researcher degrees of freedom. Ultimately, Scott concludes that the evidence is mixed - it permits believing preschool has small positive effects, but does not force that conclusion. He estimates 60% odds preschool helps in ways suggested by the studies, 40% odds it's useless. Shorter summary
Sep 04, 2018
ssc
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61 min 9,387 words 403 comments podcast (63 min)
TracingWoodgrains and Michael Pershan analyze the effectiveness of ability grouping, acceleration, and personalization software in serving advanced students in the education system. Longer summary
This post is an entry to the Adversarial Collaboration Contest by TracingWoodgrains and Michael Pershan, discussing whether the education system adequately serves advanced students. It examines three main approaches: ability grouping, acceleration, and personalization software. The authors review research on each approach, discuss their pros and cons, and explore the tensions between different educational goals. They conclude with practical advice for parents, educators, and educational reformers. Shorter summary
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