The "idealist method" is one that proposes a return of thought to itself, as the only condition for the truth and affirmation of reality. Compared to change and life, it gives recognized priority to absolute rules, in the name of a rational, immobilist and permanent dogmatism that, for a long time, has committed to the idea of the uniqueness of scientific canons. But does the dogmatic application of these canons allow us to take sufficient account of the complex objects required to study human specificities? How can we think about the "deontologization", or "subversion" (Frantz Fanon/ Matthieu Renault) of this paradigm for a broader, livelier and more open conception of the world? In any case, there seems to be no justification for science to progress in only one direction, as, for example, Claire Joubert puts it: "Science is really the meaning of the practical domains of knowledge", based on "discursivity". This assumes that "every act of thinking is necessarily an act of rethinking" (Claire Joubert). This, then, is one of the messages concealed behind this first volume.