Throughout his career Foucault made many promises of books he planned to write, only some of which were fulfilled. In History of Madness in 1961 he said:
We will show in another study how the experience of the demonic and its waning between the sixteenth and eighteenth centuries should not be understood as a victory of humanitarian or medical theory over the old, wild universe of superstition, but as a taking up again, within a critical experience, of the forms that had previously borne the threat of a tear in the fabric of the world [du déchirement du monde] (Folie et déraison, p. 34 n. 1;Histoire de la folie p. 39 n. 1; History of Madness, p. 597 n. 83).
Two essays in the 1960s particularly connect to this theme. One is “Les Déviations religieuses et le savoir médical”. The French original appeared in a book edited by Jacques le Goff, a medievalist and associate of the Annales school – Hérésies et sociétés dans l’Europe pré-industrielle, 11e-18e siècles (Mouton & Co, 1968). Foucault’s essay was reprinted in Dits et écrits.



Hérésies et sociétés dans l’Europe pré-industrielle was the proceedings of a Colloque de Royaumont of the Ecole pratique des hautes études, held between 27 and 30 May 1962 – a date which locates Foucault’s piece squarely between History of Madness and Birth of the Clinic. Royaumont is a former abbey about 20 miles north of Paris, which hosted a lot of conferences (on Gilbert Gadoffre and the Institut collégial européen, see here). In the “Note Liminaire” to the proceedings Le Goff apologies for the delay in publication, and notes that some important scholarship has been produced in the interim, but thinks the analyses in the volume are still worthwhile. One of the reasons, he suggests, is that the texts are not independent of each other, but part of a communal reflection on the topic (p. 1). He notes that not everyone in the volume was present at Royaumont, and that some of their texts were read in their absence (p. 2). Foucault was there because there is a transcript of the discussion that followed his lecture, although he does not seem to have contributed to discussion of other papers. Foucault’s text is translated as “Religious Deviations and Medical Knowledge” in the Religion and Culturecollection edited by Jeremy Carrette, though the discussion is not included.
In the discussion, Foucault says:
We all agree on the progressive hereticisation [hérétisation] of witchcraft in the 16th and 17th centuries, or at least that the heretic and the witch are treated in the same way. And I would agree with Canon Delaruelle on the anticipation of certain natural concepts by theology before their use by medicine: at the end of the 17th century it is the Church itself which convenes doctors in relation to Jansenists and the Cévennes Protestants. Fléchier asks doctors to testify that this is merely pathological phenomena, visions, hallucinations: religious conscience was more ‘progressive’ than medical conscience in this series of events. I also agree with Professor Abel that that is an association [appartenance] of madness to a number of phenomena of religious irredentism and it would need a structural study of the whole, a synchronic study, as the system is clearly different in each epoch (Hérésies et sociétés, p. 29; Dits et écrits, Vol I, p. 635; translated in my Foucault: The Birth of Power, pp. 12-13).
A few notes might be helpful. Hérétisation is, I think, as much of an ugly word in French as hereticisation is in English. Canon Delaruelle is Étienne Delaruelle, a medieval historian. Esprit Fléchier, Bishop of Nîmes, was involved in the church’s treatment of Protestants following the repeal of the Edict of Nantes. He is often looked at as a lenient and progressive figure in this regard. Foucault’s mention of ‘religious irrendentism’ is a striking phrase, not entirely clear. Irredentism is a political movement seeking to incorporate territories outside the existing boundaries of a state on the grounds of national or ethnic affinity. The term is most associated with Italian claims in the late 19th century. Does Foucault mean it to imply that the Catholic Church is trying to reincorporate breakaway elements? Richard Townsend translates the phrase as ‘religious territoriality’ in a note following the translation of the lecture (Religion and Culture,p. 56). The Professor mentioned is Armand Abel, a Belgian medieval Islamic scholar who gave a talk at the Colloquium on Muslim heresies. Foucault’s agreement is intriguing because Abel mentions the relation between heresy and the “sinner with terrible morals (sexual anomalies, communities of women, etc.)” (Hérésies et sociétés,p. 27; Dits et écrits, Vol I, p. 633).
I think the most interesting comment is Foucault’s wish for “a structural study of the whole, a synchronic study”, of the relation between “religious irrendentism” and madness. Is this a reference back to the project promised in History of Madness? The language of structure and the synchronic is close to way things are expressed in the preface to the History of Madness, removed in later editions, and Birth of the Clinic, largely removed in the second edition of 1972. I have written about that elsewhere.
In 1969 Foucault published “Médecins, juges et sorciers au XVIIe siècle” in the journal Médecine de France. It is available online here. There is no published English translation listed in Richard Lynch and Daniele Lorenzini’s bibliography. Its title would be “Doctors, Judges and Witches in the 17th Century”. There is a plan to include a translation in the new edition of Birth of the Clinic.
The date is striking. It is closer to the work of the History of Madness and, in parts, to Birth of the Clinic, than any other work of the 1960s, though it comes out several years later. It is of course conceivable that like “Religious Deviations and Medical Knowledge” Foucault wrote it much earlier than its publication. But there are no indications in Dits et écrits that it came from a lecture delivered somewhere – you could imagine Foucault being asked to speak about madness and medicine, rather than the topic of The Archaeology of Knowledge (which came out in March 1969),and finding this a new way to connect these questions. Or it may simply have been an occasional piece.
In one of the very few pieces I know which discusses “Médecins, juges et sorciers”, Colin Gordon suggests it might have been something more, a part of the promised study. It comes in his response to criticisms of his article “Histoire de la folie: An Unknown Book by Michel Foucault”, published in 1990 in History of the Human Sciences. This was a piece which claimed that many criticisms of Foucault’s work were based on shorter Madness and Civilization, a translation of an abridged French version, rather than the full study, which at the time was untranslated.
On the question of the medical status accorded to religious possession, a topic whose neglect here [H.C. Erik] Midelfort deplores, one should consult Foucault’s articles ‘Les déviations religieuses et le savoir medical” (Foucault 1968) and ‘Médecins, juges et sorciers en XVIIe siècles’ (Foucault, 1969). These pieces provide at least a fragment of the separate discussion of this issue which Foucault had promised in Histoire de la folie (1972: 39) (Colin Gordon, “History, madness and other errors: a response”, p. 389).
(Gordon’s pieces are included in Rewriting the History of Madness, which reprints the essays from this exchange, with some additions. This particular passage of Gordon’s response is rewritten, and only mentions “Les déviations religieuses” [p. 176].)
Foucault’s work of the mid-late 1960s is sometimes seen as comprising two main strands – the ‘archaeological’ work that led to The Order of Things and The Archaeology of Knowledge; and one that is somewhat neglected today, the literary work on the likes of Roussel, Flaubert, de Sade, Bataille, Klossowski, Breton, Robbe-Grillet, Verne, Blanchot and others – published in journals like Tel Quel and Critique. Some of that work blurs with what might be thought of as another element – the work on theorists like Deleuze and, partly with Deleuze, on Nietzsche. The short book on the artists René Magritte and the abortive one on Édouard Manet come from this time period as well. I discuss these different elements in my book on Foucault in the 1960s, The Archaeology of Foucault.
As I also discuss in that book, there is another strand of work, which is the continuation of work on questions of madness and medicine, which partly anticipates his later work on sexuality in books and lecture courses. The two essays being discussed here appear to bookend that work – “Médecins, juges et sorciers” can then be seen as the last of a sequence of papers that would include “Religious Deviations and Medical Knowledge” (1962, published 1968), “L’eau et la folie” (1963), “Madness, the Absence of Work” (1964; and included as an appendix to the 1972 re-edition of Histoire de la folie, and in History of Madness), and “Message ou bruit” (1966). Its publication date seems late even in comparison with that sequence.
There are a few other traces of Foucault’s interest in these questions. In a series of five radio lectures with the title “Langages de la folie” in January-February 1963 he discussed witchcraft and possession in the fourth, and his archive has a so-far unpublished text on the demonic and the imaginary (NAF 28730 box 57, folder 2). This is a typed text with some handwritten notes and corrections, which indicates that it is a fairly polished version, since Foucault typed his own texts in that period and only at a late stage. When I wrote The Archaeology of Foucault the radio lectures were only partly published, with the others available as recordings on YouTube. I discussed them briefly on pp. 10-12. Now the full sequence has been included in Entretiens radiophoniques 1961-1983 (pp. 143-216).
In The Archaeology of Foucault I wrote:
In these pieces Foucault indicates how witches and the possessed were excluded, a marginalisation which relates to his treatment elsewhere of the mad, the sexually transgressive or the criminal. In the modern understanding, this is the distinction between “the normal and the pathological”, but Foucault contends something else is at play in the pre-modern era. He challenges the simple narrative of the “triumph of medicine over superstition”. Much of the analysis looks at the question of truth and falsehood, distinguishing the deception of the devil from the illusion of those possessed. There are links to his discussion of Descartes’s three sources of doubt – dream, deception, madness – in History of Madness, here suggesting the “last years of the Renaissance were truly the age of the evil demon”.
Here and elsewhere Foucault challenges the thesis that the demonically possessed or those designated as witches or sorcerers were what we would now call mad, a claim he says is common but exemplified by Gregory Zilboorg. He suggests it was the classical age which would gradually equate these experiences as part of the general category of unreason. Later he would discuss this thesis in relation to Thomas Szasz’s The Manufacture of Madness. Foucault occasionally returned to the theme of witchcraft in interviews, and in lectures on sexuality. Foucault may have elaborated further had he written the volume on women promised in the first volume of the History of Sexuality (The Archaeology of Foucault, p. 12; in text references removed).
Richard Baxstrom and Todd Meyers’s book Realizing the Witch: Science, Cinema, and the Mastery of the Invisible is an analysis of Benjamin Christensen’s 1922 film Häxan, also known as Witchcraft Through the Ages, and in particular its claim that witches were the hysterics of an earlier period. Some elements of this topic relate to Foucault’s lecture course in 1974-75, Les Anormaux, translated as Abnormal and the hysteric is a key theme in the previous year’s course, Psychiatric Power. I’m sure there are many more connections to explore.
In the thesis typescript of Folie et déraison, recently discovered and available both in the archives of Université Paris Cité in the BU Henri-Piéron and online, the note promising a future work is different. Instead of what appears in the published book, “We will show in another study how the experience of the demonic…” Foucault says “Nous verrons plus loin (II, chap. 1) comment l’expérience du démoniaque…” (p. 45 n. 1). “We shall see later (II, Chapter 1)…”, with the reference pointing to a chapter of the thesis. The second part of the thesis has the same organisation as the published book, with the first chapter entitled “Le fou au jardin des espèces”, “The Madman in the Garden of Species”.
So, sometime between the completion of the draft thesis typescript and the version printed by Plon which he defended in 1961, Foucault decided that “the experience of the demonic and its waning” deserved fuller treatment than it had in the book. He replaced a pointer to a later chapter with a promise of a future work.
Foucault never published this fuller study, though his archive suggests he did at least begin it, and the pieces discussed here presented some of this work. His own research went in different directions, and others wrote books which developed themes from at least part of what he might have intended.
Robert Mandrou had attended the Royaumont conference and reviewed History of Madness in Annales in 1962 (with a brief addendum by Fernand Braudel). He would develop the most sustained analysis of witchcraft in France in this period in his Magistrats et sorciers en France au XVIIe siècle: une analyse de psychologie historique in 1968. Originally his doctoral thesis, a copy was presented to Foucault and is now at the Beinecke library at Yale (call number Foucault 1045). The book references Foucault’s Folie et déraison, and a book by someone who I don’t think was a relation, Maurice Foucault, Les Procès de sorcellerie dans l’ancienne France devant les jurisdictions séculières from 1907 (p. 63). In the copy he gave Foucault, Mandrou says that the book was conceived before Foucault’s Les Mots et les choses (The Order of Things) and the defence of his thesis was disrupted by May 1968.
In Foucault’s wake, many others have explored these themes, some critically or building on some of his ideas, principally in relation to the work on sexuality or madness, rather than these limited sources on witchcraft and the demonic directly. In The Archaeology of Foucault I briefly discuss Silvia Federici’s Caliban and the Witch, and mention Virginia Krause, Witchcraft, Demonology, and Confession in Early Modern France (p. 13).
References
Richard Baxstrom and Todd Meyers, Realizing the Witch: Science, Cinema, and the Mastery of the Invisible, New York: Fordham University Press, 2016.
Stuart Elden, Foucault: The Birth of Power, Cambridge: Polity, 2017.
Stuart Elden, The Archaeology of Foucault, Cambridge: Polity, 2023.
Silvia Federici, Caliban and the Witch: Women, the Body and Primitive Accumulation, London: Penguin, 2021 [2004].
Michel Foucault, Folie et déraison: Histoire de la folie à l’âge classique, Paris: Plon, 1961
Michel Foucault, Histoire de la folie à l’âge classique, Paris: Gallimard, 1972 [1961]; History of Madness, trans. Jean Khalfa and Jonathan Murphy, London: Routledge, 2005.
Michel Foucault, Dits et écrits, eds. Daniel Defert and François Ewald, Paris: Gallimard, four volumes, 1994.
Michel Foucault, “Religious Deviations and Medical Knowledge”, trans. Richard Townsend, in Religion and Culture, ed. Jeremy Carrette, London: Routledge, 1999, 50-56.
Michel Foucault, “Médecins, juges et sorciers au XVIIe siècle”, Médecine de France 200, 1969, pp.121-128; reprinted in Dits et écrits, Vol I, pp. 753-67.
Michel Foucault, Les Anormaux: Cours au Collège de France (1974-1975), ed. Valerio Marchetti and Antonella Salomani, Paris: Seuil/Gallimard, 1999; Abnormal: Lectures at the Collège de France 1974-1975, trans. Graham Burchell, London: Verso, 2003.
Michel Foucault, Entretiens radiophoniques 1961-1983, ed. Henri-Paul Fruchaud, Paris: Flammarion/Vrin/INA, 2024,
Colin Gordon, “Histoire de la folie: An Unknown Book by Michel Foucault”, History of the Human Sciences 3 (1), 1990, 3-26.
Colin Gordon, “History, madness and other errors: a response”, History of the Human Sciences 3 (3), 1990, 381-96.
Virginia Krause, Witchcraft, Demonology, and Confession in Early Modern France, New York: CUP, 2015.
Emmanuel le Doeff, “À la découverte des thèses annotées de Michel Foucault”, Panacée, 2025.
Emmanuel le Doeff, “Les thèses annotées de Michel Foucault sont désormais en ligne sur Numerabilis” Panacée, 2026.
Jacques Le Goff, Hérésies et sociétés dans l’Europe pré-industrielle, 11e-18e siècles: Colloque de Royaumont, 27-30 mai 1962, Paris/La Haye:Mouton & Co, 1968.
Richard A. Lynch and Daniele Lorenzini, “Michel Foucault’s Shorter Works in English”, https://michel-foucault.com/bibliographies/bibliography-of-foucaults-shorter-works-in-english-translation/ [last updated 2024]
Robert Mandrou, “Trois clefs pour comprendre la folie à l’époque classique”, Annales: Économies, sociétés, civilisations 4, 1962, 761-72; reprinted in Philippe Artières et. al. eds. Histoire de la folie à l’âge classique de Michel Foucault: Regards critiques 1961-2011, Caen: Presses Universitaires de Caen, 2011, 67-85.
Robert Mandrou, Magistrats et sorciers en France au XVIIe siècle: Une analyse de psychologie historique, Paris: Plon, 1968.
Arthur Still and Irving Velody eds. Rewriting the History of Madness: Studies in Foucault’s ‘Histoire de la folie’, London: Routledge, 1992.
Thomas Szasz, The Manufacture of Madness: A Comparative Study of the Inquisition and the Mental Health Movement, Syracuse: Syracuse University Press, 1997 [1970].
Gregory Zilboorg, The Medical Man and the Witch During the Renaissance, New York: Coope Square, 1969 [1935].
Archives
Fonds Michel Foucault, NAF 28730, Bibliothèque nationale de France
Michel Foucault library of presentation copies, Beinecke Library, Yale University
Michel Foucault, Folie et déraison. Histoire de l’expérience de la folie à l’âge classique, Numerabilis, BU Henri-Piéron
This piece develops and revises material from a post from 2013, with some parts of another post that year. It is the 88th post of a weekly series, posted every Sunday throughout 2025, and continuing into a second year. The posts are short essays with indications of further reading and sources. The pieces are not as formal as something I’d try to publish more conventionally, but are hopefully worthwhile as short sketches of histories and ideas. They are usually tangential to my main writing focus, a home for spare parts, asides, dead-ends and possible futures. I hope there is some interest in them. They are provisional and suggestions are welcome. A few, usually shorter, pieces in a similar style have been posted mid-week.
The full chronological list of ‘Sunday histories’ is here, with a thematic ordering here.








