Abstract
In this paper I intend to consider the various inflexions through which passes the Nietzschean concept of genealogy in Michel Foucault’s work throughout the 1970s and 1980s. I wish to point out that the genealogical procedure is modified according to the addressed subject, i.e. it does not share the same theoretical and methodological assumptions when it is focusing the rejection of the metaphysical notion of an essential origin; the relationship of reciprocity between Knowledge and Power; the project of transforming human life into a sort of work of art and, finally, the developing of an idea of truth divorced from logical, epistemological or ontological parameters