摘要：The study aims to analyze Nietzsche's critique of Western reason as well as the epistemological elements that provide support to rationality. Through the mapping of some texts from Nietzsche’s last period of his philosophical production, this study is the association between reason and décadence through a trajectory that begins with Socrates and unfolding throughout modernity, in order to determine the manner in which a certain decadent process results in the "perversion of the reason", i.e., a decaying dynamics of the reason that brings together two large corruptions: "fetishization" of the reason’s categories and deception that philosophers of knowledge incur when entangled in a "web of grammar". The analyses try to indicate both a physio-psychologist as a linguist and philologist Nietzsche.
