This paper seeks to characterize how the study of nutrition processes contributed to revisit the problem of vital organization in the late eighteenth century. It argues that focusing on nutrition leads to reformulate the problem of the relation between life and organization in terms of processes, rather than static or given structures. This nutrition-centered approach to life amounts to acknowledge the specific strategic role nutrition played in the development of a materialist approach to the generation of vital organization. The paper (...) proposes a clarification of the multiple meanings of the concept of organization in the context of Enlightenment physiology and nascent biology, before focusing on the century long analogy between nutrition and generation. It shows how, by contrasting different uses of this analogy, nutrition was employed as a key vital phenomenon in the development of epigenetic theories of generation, i.e. how a nutritive modeling of generation was used in the undermining of preformationism. To this purpose I contrast two seemingly opposite theories of generation, Buffon’s and Bonnet’s, and show that despite the obvious metaphysical discontent, their views of generation share a common mechanical conceptual frame in which nutrition is conflated with growth and repair. I then turn to the role nutrition played in the epigenetic conception of generation in C. F. Wolff’s embryology and analyze this rival understanding of nutrition as an organizing process. (shrink)

Lamarck's perspective on change within the organic world, in particular his conception of "la marche de la nature," , crystallized during the last decade of the 18th century and the early years of the 19th. I argue that it should be viewed as resulting in part from interactions with, and transfers from, the social thought—modes of thinking, ways of conceptualizing, models, metaphors and analogies—of the decades before the French revolution and of the revolutionary decade itself. Moreover, Lamarck's involvement with the (...) new institutional frameworks initiated during the revolutionary period had brought him into direct contacts with the then prevalent modes of discourse on things social. (shrink)

Il est proposé une réflexion épistémologique sur la posture que l'historien des sciences humaines peut adopter vis-à-vis de ses objets d'investigation. La théorie du « criminel-né » de Cesare Lombroso, produite dans le dernier tiers du x1xe siècle est prise ici comme exemple et support pour la discussion parce qu'elle apparaît comme un cas limite, presque caricatural, tant par sa formulation initiale que par son traitement dans la mémoire disciplinaire. Les approches normatives ou « présentistes » ne pouvant rendre compte (...) de la logique du discours de Lombroso que sur le mode de la dénégation, il a semblé préférable - sans qu'il soit nécessaire de devenir lombrosien - de suivre un autre fil directeur. On suggère de substituer à une posture épistémologique présentiste les concepts de « rationalité contextuelle » et de « présupposé cognitif». Ces concepts, combinés à une plus grande sensibilité aux différentes durées pourraient initier une approche qui serait à la fois plus spécifiquement historique et ouverte aux apports des autres sciences humaines. (shrink)