Giulio Piatti

Nel 1919, Alfred North Whitehead interviene nel corso di un convegno interdisciplinare dedicato ai dati scientifici ultimi, mostrando come né il tempo né lo spazio né alcun tipo di materiale siano in grado ricoprire questo ruolo. La natura, ai suoi occhi, è invece un insieme in continua crescita di eventi ed oggetti che si intersecano e si sovrappongono tra loro, totalmente irriducibile a ogni visione materialistica e atomistica. Il testo, finora inedito in lingua italiana, si presenta come un’efficace panoramica intorno ad alcuni concetti-chiave della filosofia di Whitehead ed è corredato da una breve introduzione, utile a contestualizzarlo.

«THE POWERFUL, NON‐ORGANIC LIFE WHICH GRIPS THE WORLD». VITALISM AND ONTOLOGY IN GILLES DELEUZE It is well known that Gilles Deleuze is the heir of a complex vitalistic tradition, beginning with Henri Bergson’s Creative Evolution and spanning through an important part of 20th century French philosophy. According to this line of thought, philosophy has to sharpen its vision in order to grasp the irreducible nature of the living. On one hand Deleuze seems to explicitly follow these intuitions, on the other though he strives to find a viable ontological framework for an actual philosophy of life, reaffirming the Nietzschean notion of being as becoming, the Bergsonian virtual coexistence of memory and Scotist univocity of the being. Through such operation, Deleuze actually seems to distance himself from a simply vitalistic approach, and to build instead an original metaphysics that understands life as a powerful inorganic force crossing all levels of reality. The organic, thus, is what traps and diverts this impersonal and germinal life. Aim of the presentation is to clarify the originality of Deleuze’s vitalistic ontology and point to its ambiguities and debts towards other philosophical traditions. Even if Deleuze apparently overturns his vitalistic roots, it is nevertheless undeniable that the vital domain will engage him throughout all of his work.

In his analysis of memory, Henri Bergson introduces the key concept of ‘virtuality’, understood as a non- actual reality, an unpredictable and pre-human élan vital. Several years later, the virtual will play a key role in the way that Gilles Deleuze tries to conceive the notion of a ‘plane of immanence’, that is, a whole that guides an inexhaustible process of actualisation. Deleuze, however, refers not only to Bergson but to Gilbert Simondon and to his concept of ‘preindividual field’, which corresponds to a metastable state, full of potential energy, from which a structured process can arise. This article undertakes an analysis of the different theoretical pathways leading to the concept of the virtual in Bergson, Simondon and Deleuze. It will investigate the transformations of this concept by focusing on the memory of the present individuated by Bergson, then applied to the cinema of the time- image by Deleuze, and on the figure of the crystal as an emblematic materialisation of the virtual, deeply present in the philosophy of both Deleuze and Simondon. The intention is to show – apart from the inevitable differences ‒ the significant continuity between these three authors, who share a common attempt to build an affirmative ontology of life. Combined Bergsonian and Simondonian influences lead in Deleuze to a metaphysics of becoming, where virtuality is always on the point of actualising itself in percepts, affects and concepts.