These four texts deal with a supposed identity problem (personal and/that is social political) in order to contest it ; the consensual notion of identity is here at stake. With the main help of Roland Barthes Gilles Deleuze Michel Foucault and Guy Hocquenghem identitary order is studied in a national context and specially from the French May and post-May. This philosophical reflection focuses on language and writing logic and psychoanalysis.