Ludovic Viallet - Anatomie d’une psychose collective : la chasse aux sorcières (15e-18e siècles)

Ludovic Viallet - Anatomie d’une psychose collective : la chasse aux sorcières (15e-18e siècles)

🎙 Ludovic Viallet 👥 157K 📅 April 9, 2026 ⏱ 81 min 👁 797 📄 lecture 🧭 2026-08-06
Available in: English (current) Français

Keywords

sorcelleriechasse aux sorcièrespsychose collectiveMoyen Âgeépoque moderne

Summary

In this conference, historian Ludovic Viallet analyzes the phenomenon of witch hunts in Western Europe from the 15th to the 18th centuries, framing it as a collective psychosis. He begins by distinguishing the historical reality of the Waldensians, a reform movement, from the fantastical accusations of diabolical sects. He traces the crystallization of the cumulative concept of witchcraft around 1430-1450, involving flight, sabbath, pact with the devil, and maleficia. Viallet argues that this represented an intellectual and rational regression, as educated elites came to believe in the reality of these imaginary crimes. He emphasizes the role of clerical and lay elites in spreading these beliefs, and the judicial mechanisms that led to mass repression. He also discusses the evolution of the concept of flight, from early skepticism to general acceptance. The lecture highlights the complexity of the phenomenon, involving beliefs, pastoral care, politics, gender relations, and mental illness. Viallet concludes by reflecting on how ancient motifs and belief-making processes remain relevant today.

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Critical Evaluation

Ludovic Viallet’s lecture is a masterful example of historical analysis applied to a complex and emotionally charged topic. He demonstrates deep expertise in the primary sources and historiographical debates, offering a nuanced interpretation that avoids both sensationalism and oversimplification. The lecture is structured logically, moving from the specific case of the Waldensians to the broader phenomenon of the witch hunts, and then to the mechanisms of repression. Viallet’s argument that the witch hunts represented an intellectual regression is compelling, as he contrasts the cultural achievements of the Renaissance with the simultaneous rise of belief in diabolical sabbaths. He carefully distinguishes between different periods and regions, acknowledging the variability of the hunts. The use of primary sources, such as the canon Episcopi and the interrogation of Waldensian preachers, grounds his analysis in concrete evidence. He also engages with contemporary debates, such as the feminist interpretation of witch hunts as femicide, while offering a more complex view that includes gender but also other factors. The lecture is accessible to a general audience but does not sacrifice scholarly rigor. The only minor weakness is the lack of visual aids or slides, which might have helped illustrate the points about imagery and texts. Overall, this is an excellent, thought-provoking lecture that provides a comprehensive overview of the witch hunts and their underlying mechanisms.

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Title / Content Match

The title accurately reflects the content: a detailed analysis of the collective psychosis behind the witch hunts from the 15th to 18th centuries.

Quality & Reliability

9/10

The lecture is given by a recognized historian specializing in medieval religious history and deviance repression. The content is based on his published work and references primary sources and scholarly debates. The presentation is nuanced and acknowledges complexity, avoiding sensationalism.

Key Moments

Cited Sources

  • Nantes Université on LinkedIn — Official LinkedIn page of Nantes Université, mentioned in the video description.
  • Nantes Université YouTube channel — Official YouTube channel of Nantes Université, where the video is hosted.

Concurring Sources

Dissenting Sources

Contribution & Novelties

The lecture provides a comprehensive and nuanced analysis of the witch hunts, emphasizing the concept of collective psychosis and the intellectual regression of the 15th century. It challenges simplistic narratives and highlights the complexity of the phenomenon.

Pour aller plus loin :

79 words

Radar Profile

The radar profile shows high scores in information quantity, quality, and reliability, with a slightly lower but still strong score in technical level, indicating a lecture that is both informative and accessible.

Reliability 9/10

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