Abstract

In What Is Philosophy?, Deleuze and Guattari attribute to Leibniz and Raymond Ruyer a vitalism of ‘a force that is but does not act’. This is a judicious characterisation of Leibniz's vitalism, but not Ruyer's. In The Fold, Deleuze presents Ruyer as a disciple of Leibniz, but if Leibniz's monads have no doors or windows, Ruyer's are nothing but doors and windows, nothing but liaisons actively forming themselves. For Ruyer, there is only one force, a consciousness-force, matter-form in sustained, non-localisable self-formation. In Deleuze's reading of Leibniz's concept of the vinculum substantiale, Deleuze comes close to presenting a notion of force like that of Ruyer's, in that the vinculum inextricably interfolds monads and bodies, but ultimately the separation of the forces of monads from those of bodies prevails in a fashion incompatible with Ruyer's conception of force. Deleuze and Guattari make use of Ruyer's understanding of consciousness and the brain as the auto-overflight of an absolute surface in their concluding remarks on philosophy and the arts in What Is Philosophy?, but they depart from Ruyer in their characterisation of the relation of force to those two domains, ultimately because they reject Ruyer's advocacy of a universal, goal-directed finalism.