# Descartes' Error: Emotion, Reason, and the Human Brain *Antonio Damasio. First published by G. P. Putnam's Sons, 1994; Penguin paperback, 2005.* > **How this note was made.** It was assembled from the publisher's page, library catalogue records, the book's table of contents (Penguin Random House, Google Books, WorldCat), the primary scientific papers, and later critiques. The book's full text was not read for this note. Chapter descriptions therefore follow the published contents list and publisher description, and are marked where they go beyond them. ## 1. Book facts | | | |---|---| | Title | *Descartes' Error: Emotion, Reason, and the Human Brain* | | Author | Antonio Damasio | | First published | 1994, G. P. Putnam's Sons, New York (ISBN 0-399-13894-3; [Open Library record](https://openlibrary.org/books/OL1103468M)) | | Edition summarized | Penguin Books paperback, 27 September 2005, 336 pages, ISBN 978-0-14-303622-7 (ISBN-10 014303622X) | | Language | English | Note: the [PRH page](https://www.penguinrandomhouse.com/books/297609/descartes-error-by-antonio-damasio/) blurb says the book's publication was "in 1995". The [Open Library record](https://openlibrary.org/books/OL1103468M) for the Putnam hardcover gives 1994, as do the Princess of Asturias Foundation biography and the Video Summaries note. This note uses 1994. **Where it came up.** - Video: [Sam Altman's coach destroys your limiting beliefs for 86 minutes straight](https://www.youtube.com/watch?v=bi23y0x-MhA), *My First Million* (episode 863; coach Joe Hudson with hosts Shaan Puri and Sam Parr). - Mentions: [22:02](https://www.youtube.com/watch?v=bi23y0x-MhA&t=1322s) and [22:47](https://www.youtube.com/watch?v=bi23y0x-MhA&t=1367s). At 22:02 Hudson cites the book for the idea that, without the emotional center, intellect stays intact but decisions become impossible (his examples are half an hour to pick a pen color and an hour or two to choose lunch; those figures are not from the book as far as this note can verify). The video's description also links the book. - Vault note: [[Video Summaries/My First Million/Sam Altman's coach destroys your limiting beliefs for 86 minutes straight]]. - The Video Summaries note records one slip: Hudson places the book "in 2012 or something". It dates from 1994. ## 2. Book resources **Reference pages** - Publisher: [Penguin Random House](https://www.penguinrandomhouse.com/books/297609/descartes-error-by-antonio-damasio/) - Open Library: [work page](https://openlibrary.org/works/OL7989278W) and the [2005 Penguin edition](https://openlibrary.org/isbn/9780143036227) - Google Books: [Descartes' Error](https://books.google.com/books/about/Descartes_Error.html?id=SLdYHlhqgKMC) (contents list with page numbers) - WorldCat: [search by ISBN](https://search.worldcat.org/search?q=bn%3A9780143036227) (WorldCat blocks automated checks, so this link is unchecked) **Where to get it** - **Amazon (print and Kindle):** [Amazon page for the Penguin paperback](https://www.amazon.com/dp/014303622X). The publisher lists a paperback ($19.00 list) and an ebook, both 336 pages. Whether a Kindle edition is currently sold on that page was not checked. - **Audible:** no English audiobook of this title was found on [Damasio's Audible author page](https://www.audible.com/author/Antonio-Damasio/B01B6YFT72). It lists only a Spanish, abridged edition, *El error de Descartes: La emoción, la razón y el cerebro humano* (translated by Joandomènec Ros, narrated by Roger Vidal, 10 h 9 min). An English audiobook is not available as far as could be found. - **Libraries (free to members):** search [Libby](https://libbyapp.com/search/query-descartes%20error%20damasio), [OverDrive](https://www.overdrive.com/search?q=descartes%27+error+damasio) and [Hoopla](https://www.hoopladigital.com/search?q=descarte%20error%20damasio). These are search links. Availability depends on your library, and none was confirmed from here. - **Internet Archive:** scanned copies exist ([2005 Penguin edition](https://archive.org/details/descarteserrorem0000dama_s2z4) and [1994 Putnam edition](https://archive.org/details/descarteserrorem00dama)), but both are in the "printdisabled" collection with restricted access. This is not a free copy for most readers. - **Open Library borrow:** Open Library's records link to the same Internet Archive scans, so the same restriction applies. - **Project Gutenberg / public domain:** not applicable. The book is in copyright, and no legal free full text from the author or publisher was found. ## 3. Author biography Antonio Damasio (born in Lisbon, 1944) is a Portuguese-American neurologist and neuroscientist. - Education: MD, University of Lisbon Medical School, 1969; PhD, University of Lisbon, 1974 (his [USC CV, via the USC Dornsife profile](https://dornsife.usc.edu/profile/antonio-damasio/)). The [Princess of Asturias Foundation](https://www.fpa.es/en/princess-of-asturias-awards/laureates/2005-antonio-damasio/?texto=trayectoria) biography dates his medical qualification to 1974, so the dates differ between sources. - University of Iowa: associate professor from 1976, professor 1980–2005 (USC CV). He headed the Department of Neurology, held the M. W. Van Allen professorship, and, with his wife Hanna Damasio, built a laboratory for research using the lesion method and functional imaging (Princess of Asturias Foundation biography). - Since 2006 he has been David Dornsife Professor of Neuroscience at the University of Southern California, and Director of the Brain and Creativity Institute (USC profile). - Honors listed on the USC profile include the Pessoa Prize (1992), the Nonino Prize (2003), the Prince of Asturias Award for Technical and Scientific Research (2005), the Honda Prize (2010), the Grawemeyer Award (2014), the International Freud Medal (2017) and the Paul MacLean Award (2019). The same profile lists the Medal of Honor of the City of Lisbon (2025). - Books after this one: *The Feeling of What Happens* (1999), *Looking for Spinoza* (2003), *Self Comes to Mind* (2010) (dates from the Asturias biography), *The Strange Order of Things*, *Feeling & Knowing*, and *Natural Intelligence & the Logic of Consciousness* (Audible lists it with a release date of 15 September 2026). Titles are from [Damasio's Audible page](https://www.audible.com/author/Antonio-Damasio/B01B6YFT72) and the [Big Think interview page](https://bigthink.com/podcast/this-incredibly-rich-machinery-with-antonio-damasio/). - Authority record: [Library of Congress](https://id.loc.gov/authorities/names/n88090795.html) (the site blocks automated checks, so this link is unchecked). ## 4. Author interviews and talks - [Lives Well Lived with Peter Singer and Kasia de Lazari-Radek, April 2025](https://boldreasoningwithpetersinger.substack.com/p/new-podcast-release-antonio-damasio) — episode notes and highlights (audio on podcast apps). Covers the roots of consciousness, "Descartes' error", Spinoza, and the mind-body connection. - [When Emotions Make Better Decisions (FORA.tv, YouTube)](https://www.youtube.com/watch?v=1wup_K2WN0I) — a 3-minute-23-second clip uploaded 11 August 2009. The upload's description points to a longer FORA.tv talk, "This Time With Feeling". The clip's content was not watched for this note. - [This incredibly rich machinery (Big Think podcast, 24 August 2019)](https://bigthink.com/podcast/this-incredibly-rich-machinery-with-antonio-damasio/) — a follow-up conversation about *The Strange Order of Things* (life, feeling and the making of cultures), which re-anchors the mind in the body. It is about the later book, not *Descartes' Error*. - Explainer, not an interview: [Then & Now, "Descartes' Error: Antonio Damasio's Somatic Marker Hypothesis"](https://www.youtube.com/watch?v=3DHh8OOBoJ4). ## 5. Summary **Thesis.** Descartes' "error" is the separation of mind from body, and with it of reason from emotion. Damasio argues that emotion is part of the machinery of rational decision-making, not an opponent of it. Patients with damage to the ventromedial prefrontal cortex keep intelligence, memory and language but make ruinous personal and social decisions, and they have flattened feeling. From that pairing he builds the **somatic-marker hypothesis**: bodily emotional signals tag options as promising or dangerous and narrow the choices before slow reasoning begins. The publisher's description puts it as "emotions are not a luxury, they are essential to rational thinking and to normal social behavior." **Outline.** The contents list is from the Penguin edition as reproduced by [Booktopia](https://www.booktopia.com.au/descartes-error-antonio-damasio/book/9780143036227.html), [eCampus](https://www.ecampus.com/descartes-error-emotion-reason-human-brain/bk/9780143036227) (with section headings), the [Wabash Center](https://wabashcenter.wabash.edu/resources/scholarship/descartes-error-emotion-reason-and-the-human-brain) and [Google Books](https://books.google.com/books/about/Descartes_Error.html?id=SLdYHlhqgKMC). Page numbers are for the Penguin paperback. The one-line glosses are mine and rest on the section headings and the publisher blurb, since I did not read the full text. - **Introduction** (p. xi) - **Part I** — the clinical problem 1. *Unpleasantness in Vermont* (p. 3) — Phineas Gage and what his 1848 injury meant. Sections include "Gage Was No Longer Gage", "Why Phineas Gage?" and "An Aside on Phrenology". 2. *Gage's Brain Revealed* (p. 20) — "The Problem", an aside on the anatomy of nervous systems, and "The Solution": locating the lesion from Gage's skull. 3. *A Modern Phineas Gage* (p. 34) — "A New Mind", "Responding to the Challenge" and "Reasoning and Deciding": a present-day patient with prefrontal damage (the book's "Elliot" case). 4. *In Colder Blood* (p. 52) — other prefrontal cases, damage beyond the prefrontal cortices, animal studies, and an aside on neurochemical explanations. - **Part II** — the explanation 5. *Assembling an Explanation* (p. 83) — organisms, bodies and brains; how the brain forms and stores "images"; "Thought Is Made Largely of Images". 6. *Biological Regulation and Survival* (p. 114) — dispositions for survival, basic regulation, drives and instincts. 7. *Emotions and Feelings* (p. 127) — what emotions are, the neural machinery behind them, feelings, and "The Body as Theater for the Emotions". 8. *The Somatic-Marker Hypothesis* (p. 165) — reasoning and deciding in a personal and social space, the hypothesis itself, overt and covert somatic markers, intuition, "The Help of Emotion, for Better and for Worse". - **Part III** — tests and implications 9. *Testing the Somatic-Marker Hypothesis* (p. 205) — "To Know but Not to Feel", the gambling experiments, "Myopia for the Future", and physiological correlates. 10. *The Body-Minded Brain* (p. 223) — "No Body, Never Mind", "The Body as Ground Reference", "The Neural Self". 11. *A Passion for Reasoning* (p. 245) — includes a section titled "Descartes' Error". - **Postscriptum** (p. 253) — "The Human Heart in Conflict", "Modern Neurobiology and the Idea of Medicine", "A Note on the Limits of Neurobiology Now", "Leverage for Survival" - **Notes and References** (p. 269); **Further Reading** (p. 293); **Acknowledgments** (p. 299); **Index** (p. 301) **Key ideas** - Rational choice depends on emotional signals, not only on logic. - The body takes part in thinking: the brain maps the body's states, and those maps feed decisions. - Somatic markers work as a fast filter for choices, often before conscious deliberation. - The ventromedial prefrontal cortex links situations with emotional memory. - Mind-body dualism, the "Cartesian" view, is the error of the title. The case against it is a biological argument, not a purely philosophical one. ## 6. Fact-check Overall verdict: **mixed**. The clinical observations are well documented. The book's best-known inferences, about Gage and about unconscious somatic markers, are contested. | Claim | Verdict | Evidence | |---|---|---| | Gage survived a tamping iron through the head on 13 September 1848 and was reported to have changed in character | **Supported** (the accident); **disputed** (permanence) | The accident is documented in [Harlow 1848](https://collections.countway.harvard.edu/onview/items/show/25402) and [Harlow 1868](https://en.wikisource.org/wiki/Recovery_from_the_passage_of_an_iron_bar_through_the_head), which includes the "no longer Gage" report. [Macmillan & Lena 2010](https://pubmed.ncbi.nlm.nih.gov/20480430/) argue that Gage "eventually made a surprisingly good psychosocial adaptation to his injury"; see also [Macmillan's summary](https://www.uakron.edu/gage/adaptation.dot). Treat the lasting "ruined personality" version as unproven. | | Reconstruction of Gage's skull shows damage to both ventromedial prefrontal regions | **Disputed** | The claim is from [Damasio et al., Science 1994](https://pubmed.ncbi.nlm.nih.gov/8178168/). A [CT-based reanalysis (Ratiu et al. 2004)](https://pubmed.ncbi.nlm.nih.gov/15165371/) found "the cerebral injury was limited to the left frontal lobe". [Van Horn et al. 2012](https://pmc.ncbi.nlm.nih.gov/articles/PMC3353935/) modeled the path of the iron and found that "considerable damage was, indeed, localized to the left frontal cortex", with widespread effects on network connectivity. The Science paper itself notes the lesion "has been presumed to have involved the left frontal region" before its own reconstruction. | | "Elliot" and similar patients keep intellect but lose real-life decision-making | **Supported**, with caveats | The case literature is real: [Eslinger & Damasio 1985](https://pubmed.ncbi.nlm.nih.gov/4069365/) (patient "EVR"; the identification with the book's "Elliot" is made in secondary sources, which this note did not check against the book text, so it is **unverified** here). Related: [Bechara et al. 1994](https://pubmed.ncbi.nlm.nih.gov/8039375/), whose abstract describes a real-life decision-making defect that "contrasts with otherwise normal intellectual functions", and [Anderson et al. 1999](https://pubmed.ncbi.nlm.nih.gov/10526345/), which concerns damage in early life. | | Somatic markers, nonconscious emotional signals, guide advantageous choices before conscious knowledge (Iowa Gambling Task) | **Disputed** | [Maia & McClelland, PNAS 2004](https://pmc.ncbi.nlm.nih.gov/articles/PMC528759/) report that participants "have much more knowledge about the game than previously thought" and conclude "there is no need to appeal to nonconscious somatic markers" in this task. [Dunn, Dalgleish & Lawrence 2006](https://doi.org/10.1016/j.neubiorev.2005.07.001), "The somatic marker hypothesis: a critical evaluation", reviews the hypothesis critically (its abstract was not read for this note). Commentary on the paper appeared in the same journal (PNAS 2004;101:16709) and in *Trends in Cognitive Sciences* (2005;9:159–164), and a [2022 reanalysis of Maia and McClelland's data](https://doi.org/10.3389/fpsyt.2022.788456) revisited it. The hypothesis remains influential but unsettled. | | The Iowa Gambling Task reliably shows healthy people learning to favor good decks | **Disputed** | [Steingroever et al. 2013](https://pubmed.ncbi.nlm.nih.gov/22984804/) found that healthy participants "often prefer decks with infrequent losses" and show "idiosyncratic choice behavior", and that their findings "question the prevailing interpretation of IGT data". | | Emotion is integral to reasoning (the broad thesis) | **Mixed / interpretive** | Widely influential in neuroscience and psychology. The mechanism proposed (somatic markers) is the contested part. This is partly a conceptual claim and is not settled by one experiment. | ## 7. Citations and references **Notable sources behind the book's argument** (not an extraction of the book's own bibliography, which this note did not read in full): - J. M. Harlow, ["Passage of an Iron Rod through the Head"](https://collections.countway.harvard.edu/onview/items/show/25402), *Boston Medical and Surgical Journal* 39 (1848): 389–393. - J. M. Harlow, ["Recovery from the Passage of an Iron Bar through the Head"](https://en.wikisource.org/wiki/Recovery_from_the_passage_of_an_iron_bar_through_the_head), *Publications of the Massachusetts Medical Society* 2 (1868): 327–347. - H. Damasio, T. Grabowski, R. Frank, A. M. Galaburda, A. R. Damasio, ["The Return of Phineas Gage"](https://pubmed.ncbi.nlm.nih.gov/8178168/), *Science* 264 (1994). - P. J. Eslinger & A. R. Damasio, ["Severe disturbance of higher cognition after bilateral frontal lobe ablation: patient EVR"](https://pubmed.ncbi.nlm.nih.gov/4069365/), *Neurology* 35 (1985): 1731–41. - A. Bechara, A. R. Damasio, H. Damasio, S. W. Anderson, ["Insensitivity to future consequences following damage to human prefrontal cortex"](https://pubmed.ncbi.nlm.nih.gov/8039375/), *Cognition* 50 (1994): 7–15. **Later work used for the fact-check:** [Ratiu et al. 2004](https://pubmed.ncbi.nlm.nih.gov/15165371/); [Macmillan & Lena 2010](https://pubmed.ncbi.nlm.nih.gov/20480430/); [Van Horn et al. 2012](https://pmc.ncbi.nlm.nih.gov/articles/PMC3353935/); [Maia & McClelland 2004](https://pmc.ncbi.nlm.nih.gov/articles/PMC528759/); [Dunn et al. 2006](https://doi.org/10.1016/j.neubiorev.2005.07.001); [Steingroever et al. 2013](https://pubmed.ncbi.nlm.nih.gov/22984804/); [Anderson et al. 1999](https://pubmed.ncbi.nlm.nih.gov/10526345/); [Mind Hacks on Macmillan & Lena](https://mindhacks.com/2010/05/19/the-rehabilitation-of-phineas-gage/). **Pages used for this note:** [PRH](https://www.penguinrandomhouse.com/books/297609/descartes-error-by-antonio-damasio/), [Amazon](https://www.amazon.com/dp/014303622X), [Open Library work](https://openlibrary.org/works/OL7989278W), [Open Library 1994 edition](https://openlibrary.org/books/OL1103468M), [Google Books](https://books.google.com/books/about/Descartes_Error.html?id=SLdYHlhqgKMC), [Wabash Center listing](https://wabashcenter.wabash.edu/resources/scholarship/descartes-error-emotion-reason-and-the-human-brain), [Booktopia](https://www.booktopia.com.au/descartes-error-antonio-damasio/book/9780143036227.html), [eCampus](https://www.ecampus.com/descartes-error-emotion-reason-human-brain/bk/9780143036227), [USC Dornsife](https://dornsife.usc.edu/profile/antonio-damasio/), [Princess of Asturias Foundation](https://www.fpa.es/en/princess-of-asturias-awards/laureates/2005-antonio-damasio/?texto=trayectoria), [Audible author page](https://www.audible.com/author/Antonio-Damasio/B01B6YFT72), [Internet Archive 1994 scan](https://archive.org/details/descarteserrorem00dama), [Internet Archive 2005 scan](https://archive.org/details/descarteserrorem0000dama_s2z4), the interview links in section 4, and the video [on YouTube](https://www.youtube.com/watch?v=bi23y0x-MhA). Part of this note rests on publisher and library descriptions, not on a reading of the book. Anything marked **unverified** was not confirmed against a primary source.