Gilbert Simondon (October 2, 1924 – February 7, 1989) was a French philosopher best known for his theory of individuation.Born in Saint-Étienne, Simondon was a student of philosopher of science Georges Canguilhem, Martial Guéroult, and phenomenologist Maurice Merleau-Ponty. He studied at the Ecole Normale Supérieure and the Sorbonne. He defended his doctoral dissertations in 1958. His main thesis, L'individuation à la lumière des notions de Forme et d'Information (Individuation in the light of the notions of Form and Information), was published in two parts, the first in 1964 under the title L'individu et sa génèse physico-biologique (Individuation and its physical-biological genesis) at the Presses Universitaires de France, while it is only in 1989 that Aubier published the second part, L'individuation psychique et collective (Psychic and collective individuation). While his main thesis, which laid the foundations of his thinking, was not widely read until it was commented upon by Gilles Deleuze and, more recently, Bruno Latour and Bernard Stiegler, his complementary thesis, Du mode d'existence des objets techniques (On the mode of existence of technical objects) was published by Aubier immediately after being completed (in 1958) and had an instant impact on a wide audience. It was only in 2005 that Jérôme Millon published a complete edition of the main thesis.
 Individuation and technology
In L'individuation psychique et collective, Simondon developed a theory of individual and collective individuation, in which the individual subject is considered as an effect of individuation, rather than as a cause. Thus the individual atom is replaced by the neverending process of individuation. Simondon also conceived of "pre-individual fields" as the funds making individuation itself possible. Individuation is an always incomplete process, always leaving a "pre-individual" left-over, itself making possible future individuations. Furthermore, individuation always creates both an individual and a collective subject, which individuate themselves together.
Gilbert Simondon criticized Norbert Wiener's theory of cybernetics, arguing that, "Right from the start, Cybernetics has accepted what all theory of technology must refuse: a classification of technological objects conducted by means of established criteria and following genera and species." Simondon aimed to overcome the shortcomings of cybernetics by developing a "general phenomenology" of machines.