"The priest said: 'God speaks through me.' The bourgeois said: 'Reason speaks through the market.' The expert says: 'Science speaks through institutions.' In each case, a particular class claims to be the vehicle of a universal truth." — What Would Marx Say Today?
Another great companion piece is Why Reasonable Ideas Die
How to Read This Document
Across these cases, a few structural failure modes recur:
- No feedback loop — the expert never bears the consequence of their error.
- Complexity as cover — failure is attributed to implementation rather than the framework.
- Institutional lag — by the time the evidence is clear, careers and budgets are built around the wrong answer.
- Critique gets credentialed out — those closest to the failure lack the credential to make the critique legible.
The failures that get corrected fastest are where money is on the line for someone powerful. Opioids, deinstitutionalization, structural adjustment — costs fell on dispersed, non-credentialed populations and persisted for decades.
Medicine & Public Health
Stomach Ulcers Are Caused by Stress
For most of the 20th century, medical doctrine held that peptic ulcers were caused by stress, spicy food, and excess stomach acid. Barry Marshall and Robin Warren's bacterial hypothesis — that H. pylori was the actual cause — was rejected by the gastroenterological establishment throughout the 1980s. Marshall's abstract was ranked in the bottom 20% of submissions at Australia's 1983 Gastroenterological Society meeting. He later described his reception: "To gastroenterologists, the concept of a germ causing ulcers was like saying that the Earth is flat."
Unable to get the scientific community to take his work seriously, Marshall drank a petri dish of H. pylori himself in 1984. As he put it, "It's a lot easier to obtain forgiveness than permission." He developed acute gastritis within days. He and Warren were awarded the Nobel Prize in 2005. Ulcers are now cured with a short course of antibiotics, and stomach cancer — once among the most common malignancies — is nearly eliminated from the Western world.
Why it persisted: A multi-billion-dollar industry in acid-suppressing drugs (Tagamet, Zantac) had no incentive to find a cure. As Marshall noted, these were recurring diseases that kept patients returning — a permanent revenue stream. The "Acid Mafia" was not enthusiastic.
Sources: Nobel Prize Interview · Discover Magazine · Penn State Profile
Dietary Fat Causes Heart Disease
Ancel Keys' Seven Countries Study (begun 1956, published 1978) shaped half a century of nutritional guidance with its conclusion that saturated fat caused heart disease. The American Heart Association adopted low-fat dietary guidelines in 1961; the USDA followed in 1980.
Critics — including British nutritionist John Yudkin, who argued sugar was the primary culprit — were systematically marginalized. Keys spent years publicly excoriating Yudkin, and researchers who disagreed with the fat-heart hypothesis found it increasingly difficult to obtain funding. By 1986, as one account notes, "the critics had been completely shut out and silenced."
A 1994 Italian reanalysis of the raw Seven Countries data found that the category of food most strongly correlated with coronary mortality (r=0.821) was "sweets" — not fat. The official dietary guidelines that told Americans to replace fat with carbohydrates coincided with the beginning of the obesity epidemic.
Why it persisted: Keys held significant sway over research funding. The sugar industry actively funded research to shift blame onto fat. The low-fat food industry built enormous commercial infrastructure around the guidelines.
Sources: Wikipedia: Seven Countries Study · Diabetes.co.uk / Nina Teicholz · FSNS: Natural and Added Sugars
Lobotomies
Portuguese neurologist António Egas Moniz received the 1949 Nobel Prize in Physiology or Medicine for developing the prefrontal lobotomy. American physician Walter Freeman popularized the "ice-pick" transorbital procedure, performing it in assembly-line fashion — sometimes in his converted van ("the lobotomobile") — on tens of thousands of patients. The procedure was performed on children, on people with depression, on homosexuals, and on anyone considered socially inconvenient.
The mainstream medical establishment embraced lobotomies throughout the 1940s and early 1950s. Patients had no meaningful recourse. The Nobel Prize was never rescinded.
Sources: Wikipedia: Lobotomy · History of Psychiatry
Thalidomide
Thalidomide was prescribed across Europe in the late 1950s as a safe sedative and treatment for morning sickness in pregnant women. It was endorsed and distributed by physicians. The result: an estimated 10,000 children were born with severe limb deformities. The drug's approval in the UK, Germany, and elsewhere was not the act of rogue practitioners — it was the standard of care, signed off by official regulatory bodies. The United States was spared largely due to one FDA reviewer, Frances Kelsey, who withheld approval pending further evidence.
Sources: Wikipedia: Thalidomide · Smithsonian Magazine
The Opioid Crisis
The "pain as the fifth vital sign" movement, pushed through the 1990s by professional medical societies (including the American Pain Society) and pharmaceutical companies, redefined under-treatment of pain as a patient rights issue. Purdue Pharma's marketing of OxyContin explicitly targeted physicians with claims — backed by funded studies and sponsored CME — that the risk of addiction from opioids for chronic pain was under 1%. This was not fringe medicine. The Joint Commission endorsed pain treatment standards. Medical boards threatened physicians who undertreated pain.
The result: over 500,000 Americans have died from opioid overdoses since 1999. The Sackler family and Purdue Pharma have since paid billions in settlements. The prescribing guidelines were written by the same credentialed apparatus that created the epidemic.
Sources: CDC: Opioid Overdose Data · NEJM: Opioid Crisis Origins
Low-Dose Aspirin for Primary Prevention
For decades, physicians recommended daily low-dose aspirin to healthy adults to prevent heart attacks. Major medical societies endorsed this guidance. Millions followed it. Systematic review eventually showed that for people without established heart disease, the bleeding risk of daily aspirin outweighed the cardiac benefit. The recommendation was reversed — but only after a generation of patients had already been exposed to net harm on expert advice.
Sources: USPSTF 2022 Aspirin Recommendation · NEJM ASPREE Trial
Hormone Replacement Therapy
Post-menopausal hormone replacement therapy was broadly recommended by physicians through the 1980s and 1990s based on observational evidence suggesting cardiovascular and cognitive benefits. In 2002, the Women's Health Initiative randomized trial found elevated risks of breast cancer, stroke, and blood clots. Recommendations were largely reversed. Then, subsequent research suggested that timing mattered — HRT initiated close to menopause had a better risk profile. Each reversal arrived after a generation of women had already acted on the prior consensus.
Sources: WHI Study, JAMA 2002 · NIH Women's Health Initiative
Refrigerator Mother Theory of Autism
Bruno Bettelheim, the influential University of Chicago psychologist, promoted the theory that autism was caused by cold, emotionally withholding mothers — "refrigerator mothers." His 1967 book The Empty Fortress was taken seriously by the psychiatric establishment. Mothers were institutionally blamed, shamed, and subjected to years of psychoanalytic intervention aimed at their presumed emotional failure. Bettelheim was later revealed to have fabricated his credentials and abused patients.
Sources: Wikipedia: Refrigerator Mother Theory
Recovered Memory Therapy
Through the 1980s and 1990s, a therapeutic consensus held that traumatic memories could be repressed and later recovered through hypnosis and suggestion. Credentialed therapists "uncovered" memories of childhood sexual abuse, satanic ritual abuse, and alien abduction. These recovered memories destroyed families, produced false accusations, and sent innocent people to prison. Cognitive psychologist Elizabeth Loftus spent decades fighting the entire professional establishment to demonstrate that memory is reconstructive and highly susceptible to suggestion. She faced professional retaliation and harassment. She was eventually vindicated.
Sources: Wikipedia: Recovered Memory Therapy · Loftus: The Reality of Repressed Memories (1993)
Facilitated Communication for Autism
Facilitated communication — the practice of a "facilitator" physically supporting the hand of a nonverbal autistic person who then "types" messages — was embraced by special education professionals and researchers in the early 1990s. Universities ran training programs. The technique was used in courtrooms. Abuse allegations against parents resulted from messages that turned out to be generated by the facilitators themselves. Controlled studies consistently showed this was ideomotor effect — the facilitators were unconsciously producing the output. Major scientific organizations eventually condemned the practice, but not before it ruined lives.
Sources: Wikipedia: Facilitated Communication · American Psychological Association Statement
Education
DARE Program
Drug Abuse Resistance Education was launched in 1983 as a police-school partnership to prevent youth drug use. It was adopted by 75% of American school districts. Randomized controlled trials showed not only that it had no effect on drug use, but that it may have increased it in some populations. The Government Accountability Office reviewed six long-term evaluations and found no significant differences in illicit drug use between DARE participants and non-participants. The program continued for decades because it employed a class of people and felt credible.
Sources: GAO Report GAO-03-172R · Surgeon General's Report on Youth Violence (2001)
Scared Straight Programs
Scared Straight programs — in which juvenile offenders were brought to prisons to be intimidated by inmates — became policy fixtures across the United States after a 1978 documentary celebrated the approach. Randomized controlled trials consistently showed they increased subsequent offending. A 2003 Campbell Collaboration systematic review found that youth who went through Scared Straight were significantly more likely to reoffend than control groups. The programs continued.
Sources: Campbell Collaboration Systematic Review (2003) · Wikipedia: Scared Straight
Education School Programs / Teacher Training
Education schools have been subject to extensive research showing weak or negligible effects on student outcomes from most standard teacher preparation curricula. The research on reading instruction — particularly the expert consensus that rejected phonics-based instruction in favor of "whole language" approaches — has been comprehensively reversed. Generations of children, disproportionately from disadvantaged backgrounds, struggled to read because of expert-designed curricula. The "reading wars" were eventually settled by cognitive science, not by the education establishment reversing course voluntarily.
Sources: National Reading Panel (2000) · Emily Hanford: Hard Words (APM Reports)
Economics & Finance
Austerity as Recovery: The Reinhart-Rogoff Error
In 2010, Harvard economists Carmen Reinhart and Kenneth Rogoff published "Growth in a Time of Debt," which argued that countries with debt-to-GDP ratios above 90% experienced dramatically reduced growth. European policymakers, Paul Ryan, and the IMF used the paper to justify austerity programs across the Western world. The paper's key finding — a -0.1% average growth rate above the 90% threshold — was cited in political debates as settled scientific authority.
In 2013, a University of Massachusetts graduate student, Thomas Herndon, found that Reinhart and Rogoff had accidentally omitted five countries from their Excel formula by failing to extend the selection range. When corrected, the average growth rate above 90% debt was not -0.1% but +2.2%. As Paul Krugman wrote: "What the Reinhart-Rogoff affair shows is the extent to which austerity has been sold on false pretenses." Policy had already been enacted. Austerity had already been imposed.
Sources: Wikipedia: Growth in a Time of Debt · The Conversation: The Reinhart-Rogoff Error · LSE: Why Reinhart and Rogoff Are Wrong
The Efficient Market Hypothesis as Deregulation Policy
The efficient market hypothesis (EMH) was not merely an academic theory — it was the intellectual foundation for financial deregulation policy throughout the 1990s and 2000s. Alan Greenspan told Congress in 2008: "I found a flaw in the model that I perceived as the critical functioning structure that defines how the world works." He acknowledged having gone "40 years or more" on this model with "very considerable evidence that it was working exceptionally well."
Greenspan had explicitly opposed derivatives regulation in 1994, 1997, and 2002. The deregulation he championed was not populist improvisation — it was the expert consensus of mainstream economics and the Federal Reserve.
Sources: NPR: Greenspan Admits Free Market Ideology Flawed · PBS NewsHour
The Washington Consensus and Development Economics
The IMF and World Bank imposed privatization, austerity, and rapid trade liberalization on developing countries throughout the 1980s and 1990s as conditions of lending — a policy package called the "Washington Consensus." The countries that ignored this consensus — South Korea, Taiwan, China — industrialized rapidly using activist industrial policy, state-directed investment, and strategic protectionism. The countries that followed it largely did not. Nobel laureate Joseph Stiglitz resigned from the World Bank in 1999 over these policies.
Sources: Stiglitz: Globalization and Its Discontents (2002) · Wikipedia: Washington Consensus
Comparative Advantage and the China Shock
The expert consensus among economists in the 1990s and early 2000s was that free trade with China would produce net gains for the United States. This was not wrong in aggregate — it was wrong about distribution. MIT economist David Autor's landmark "China Shock" research (2013) documented that manufacturing communities experienced concentrated, persistent wage and employment losses that macro models had systematically failed to anticipate. The economists who designed trade policy did not live in Youngstown or Detroit. The costs fell on people who had no credentialed voice in the policy debate.
Sources: Autor, Dorn, Hanson: "The China Syndrome" (AER 2013) · Vox: The China Shock
The Euro as Optimal Currency Area
Mainstream economists endorsed European monetary union despite the well-known conditions for an optimal currency area — labor mobility and fiscal transfers — not being met. The political will to create the euro was mistaken for the economic infrastructure to sustain it. Greece, Italy, Spain, and Portugal bore the subsequent costs of adjustment under a currency they could not devalue. The academic framework was not wrong in theory; it was wrong in application, and the experts who applied it bore none of the cost.
Sources: Wikipedia: Optimal Currency Area · Krugman: Revenge of the Optimum Currency Area (2012)
Urban Planning & Social Policy
High-Rise Public Housing
Mid-century urban planners, led by modernist architects and social reformers, believed that demolishing "slums" and replacing them with Le Corbusier-inspired tower blocks would cure urban poverty. These projects — Pruitt-Igoe in St. Louis, Cabrini-Green in Chicago, the Red Hook Houses in New York — became concentrated reservoirs of poverty, crime, and social dysfunction. The destruction of dense, mixed-income neighborhoods replaced functional if imperfect communities with social deserts. Pruitt-Igoe was demolished just 18 years after completion. The Smithsonian called it a cautionary tale about the limits of expert social engineering.
Sources: Smithsonian: Pruitt-Igoe · Wikipedia: Pruitt–Igoe
Deinstitutionalization
The expert psychiatric consensus of the 1960s held that releasing patients from state mental hospitals into "community care" would be more humane and therapeutically effective than institutionalization. Between 1955 and 1994, the number of patients in state psychiatric hospitals fell from 560,000 to under 72,000. The community care infrastructure never materialized. The downstream result is visible in every American city: the United States has effectively outsourced psychiatric care to jails, prisons, and the streets, where roughly 30% of the homeless population has serious mental illness.
Sources: NAMI: Deinstitutionalization · Torrey, et al.: The Shortage of Public Hospital Beds for Mentally Ill Persons (2008)
Exclusionary Zoning
Single-family zoning was designed, implemented, and enforced by credentialed urban planners and local governments throughout the 20th century. It is now broadly acknowledged by the same expert class to have driven urban sprawl, dramatically increased carbon emissions, destroyed housing affordability in productive metros, and entrenched racial and economic segregation. The people most harmed by these policies — renters, lower-income workers, racial minorities — had the least voice in the planning processes that created them.
Sources: Brookings: Exclusionary Zoning · NYT: How Zoning Became a Tool for Segregation
Criminal Justice
Crack Cocaine Sentencing Disparities
The 100-to-1 sentencing disparity between crack and powder cocaine was not an accident of prejudice slipping past expert scrutiny — it was the deliberate product of expert criminological and legislative consensus in 1986. The Anti-Drug Abuse Act codified the disparity with bipartisan support, backed by claims about crack's unique pharmacology and dangerousness. The result was a sentencing regime that imposed five-year mandatory minimums for 5 grams of crack while requiring 500 grams of powder cocaine for the same sentence — devastating Black communities while leaving largely white powder cocaine users unaffected. The Fair Sentencing Act of 2010 reduced the disparity to 18:1. The original expert consensus was never revisited or apologized for.
Sources: Wikipedia: Fair Sentencing Act · ACLU: Cracks in the System
Sex Offender Registries
Public sex offender registries were created on the assumption that monitoring released offenders in the community would reduce reoffending. The criminological evidence has consistently failed to support this. A growing body of research — including work by the Justice Department and the Rand Corporation — finds registries have no significant effect on sex crime rates while creating conditions (unemployment, homelessness, social isolation) that may increase reoffending risk. The policies persist because they are politically untouchable, not because experts continue to believe in them.
Sources: Human Rights Watch: No Easy Answers (2007) · Letourneau et al.: Megan's Law and its Impact on Registration Evasion (2009)
Replication Crisis
Psychology, Nutrition, and Social Science
The Open Science Collaboration's 2015 replication project attempted to reproduce 100 studies from top psychology journals. Fewer than 40% replicated. The peer review system had credentialed the original results. Entire subfields — ego depletion, power posing, social priming — have failed systematic replication. The same pattern holds in nutrition science, where landmark findings regularly fail to reproduce. In cancer biology, one initiative found that 89 of 97 "landmark" preclinical results could not be replicated.
Notably, the problem is not fraud (though there is some) but structural incentives: academic careers reward positive novel findings, not null results; statistical flexibility allows researchers to find significance in noise; peer review is performed by people whose own careers depend on the same system.
Sources: Open Science Collaboration: Estimating the Reproducibility of Psychological Science (Science, 2015) · Begley & Ellis: Raise standards for preclinical cancer research (Nature, 2012)
Policy Failures from the User's Original List
Wealth Taxes
Wealth taxes have been implemented and largely abandoned in a majority of European countries that tried them — Sweden, Germany, Austria, Finland, France, and others — due to capital flight, valuation difficulties, and administrative costs that outweighed revenues. Economists who designed these schemes did not adequately model behavioral responses. France reinstated and then abandoned its wealth tax (ISF) multiple times, most recently replacing it with a narrower real estate levy in 2018 after visible capital flight. The expert case for wealth taxes persists in academic form while the empirical record of implementation is consistently poor.
Sources: OECD: The Role and Design of Net Wealth Taxes (2018) · Wikipedia: Wealth Tax
2008 Financial Crisis Bailouts
The expert consensus among economists and policymakers in 2008-09 was that stabilizing the financial system required rescuing large financial institutions — "too big to fail." The policy was designed by credentialed economists and implemented by Treasury officials and Fed governors. The distributional results: financial institutions were made whole, executives retained bonuses, and the costs — unemployment, foreclosure, lost savings — fell on the non-credentialed population that had not originated the crisis. The expert framework addressed systemic risk while systematically ignoring the moral hazard it created for future crises.
Sources: Neil Barofsky: Bailout (2012) · ProPublica: Bailout Tracker
Covid: Lab Leak Suppression
In February 2020, a letter signed by 27 prominent scientists and published in The Lancet dismissed the lab leak hypothesis as a "conspiracy theory," providing expert cover for its exclusion from mainstream discourse. Internal communications later revealed that some signatories had significant institutional conflicts of interest — particularly those connected to the EcoHealth Alliance, which had funded gain-of-function research at the Wuhan Institute of Virology. By 2023, the FBI, the Department of Energy, and — eventually — the CIA (with low confidence) assessed a lab-related origin as plausible or likely. The NIH acknowledged funding research that met the definition of enhanced potential pandemic pathogen research, which had earlier been denied.
Sources: Calisher et al., The Lancet, February 2020 · Wall Street Journal: FBI Assesses Covid Likely From Lab Leak · Vanity Fair: Lab Leak Investigation
Covid Vaccine Efficacy Claims
The initial communication around Covid-19 vaccine efficacy used relative risk reduction (95% efficacy against symptomatic infection in the Pfizer trial) in a context that was misread by the public — and often by communicators — as protection against all infection and transmission. Subsequent evidence showed substantially reduced efficacy against Omicron variants, and the transmission-blocking claims used to justify vaccine mandates were not supported by the clinical trial data (which was not designed to measure transmission). The expert class's insistence on mandates even as this evidence emerged, and the institutional suppression of dissent (including the Great Barrington Declaration's call for focused protection), damaged long-term public health credibility.
Sources: Brown et al.: Covid-19 Vaccine Efficacy and Effectiveness (The Lancet Microbe, 2021) · Katelyn Jetelina: What the CDC Actually Said About Vaccines and Transmission
Gender-Affirming Care for Minors
The WPATH (World Professional Association for Transgender Health) standards of care for gender-affirming treatment in minors — including puberty blockers and cross-sex hormones — were presented as settled expert consensus and used to justify clinical practice and legal protection. Systematic reviews commissioned by health authorities in Sweden, Finland, the UK (Cass Review, 2024), and Denmark found the evidence base was of "remarkably low quality" and insufficient to justify routine clinical use. The UK's NHS subsequently halted puberty blocker prescriptions for gender dysphoria. The Cass Review found that many young patients had co-occurring mental health conditions that were not adequately assessed and that social contagion may have played a role in diagnosis patterns.
"The reality is that we have remarkably weak evidence on the long-term outcomes of interventions to manage gender-related distress in children and young people." — Cass Review Interim Report, 2022
Sources: Cass Review Final Report (2024) · NHS England: Puberty Suppressing Hormones (2024)
Single-Mother Benefits and Family Formation
Aid to Families with Dependent Children (AFDC) created a structure in which benefits were contingent on the absence of an employed man from the household — effectively penalizing marriage and two-parent family formation among low-income populations. Experts and social workers designed, defended, and administered this system for decades. The welfare reform literature (Moynihan Report, 1965; Charles Murray's Losing Ground, 1984) documenting its effects was either ignored or dismissed as ideologically motivated. The 1996 welfare reform that restructured incentives produced measurable improvements in employment and family income.
Sources: Moynihan Report (1965) · Wikipedia: Aid to Families with Dependent Children
Globalization and Manufacturing Offshoring
See Comparative Advantage and the China Shock above. The expert consensus was not that manufacturing job loss would be painless — it was that it would be transitional and that the gains would outweigh the losses. Retraining programs were prescribed as the solution. The retraining programs largely failed. The communities that bore the costs were not represented in the rooms where the policy was made.
Development Economics
Structural Adjustment Programs
See The Washington Consensus above.
Bed Nets vs. Direct Cash Transfers
Decades of expert-designed foreign aid prioritized specific interventions — mosquito nets, vaccination campaigns, agricultural inputs — over direct cash transfers to poor people, on the theory that experts knew how to allocate resources better than recipients. GiveDirectly's randomized controlled trials of direct cash transfers in East Africa consistently showed outcomes comparable to or exceeding expert-designed programs. Multiple Cochrane reviews and J-PAL studies have found that giving poor people money tends to be more effective than giving them goods and services. An entire NGO and development economics industry had been built on the assumption that the credentialed knew better.
Sources: GiveDirectly Research · Blattman & Niehaus: Show Them the Money (Foreign Affairs, 2014)
Meta-Analysis
The Pattern
These failures share a structure that cannot be explained by random error or bad luck. The common element is the insulation of the expert from the consequence of their error. Where correction happens quickly, it is almost always because someone powerful is losing money. Where correction takes decades — deinstitutionalization, dietary fat, opioids, DARE — it is because the costs fell on people who lacked the credential to make their experience count as evidence.
The philosopher of science Karl Popper identified falsifiability as the criterion of genuine knowledge. What these cases reveal is that expert knowledge often fails not the test of falsifiability in principle but the test of institutional willingness to be falsified. A solved problem is an eliminated budget line. A managed problem is a permanent revenue stream.
As your essay on the professional-managerial class argues, this is not a bug of expertise — it is a feature of how the credentialed class reproduces itself.
Compiled from publicly available sources. Links provided where possible. This is a living document.
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