Bactéries alchimistes : de l’agentivité microbienne aux matières vivantes

Based on the work of the American microbiologist Lynn Margulis, this paper proposes an overview of the ontological, epistemological and methodological contribution made by scientific and anthropological analyses concerning bacteria. The aim is to show how attention to bacterial microfauna has led to a renewed understanding of both the living world and materiality, opening up a horizon of thought for living matter. Bacteria transform organic and inorganic matter and appear therefore to be capable of agentivity, of doing and acting. In order to understand, from their point of view, the meaning of materials, and to think about matter through the prism of its particular combinations and specific transformations, an alchemist reading of the bacterial world, based on the new materialisms, allows us to underline the entanglement of matter and interactions, and to deepen the decentring in a more-than-human direction.