The present article analyses the different forms of stupidity as they are presented in the two renowned lectures held by Musil in 1937, in particular by trying to connect them to some passages from The Man Without Qualities. Stupidity cannot be reduced to a simple “inability to understand”. It becomes the symptom of a wider crisis involving the whole European tradition: a crisis of trust in human nature that ends up compromising every possible overall vision about culture and life. Valéry arrived to a similar outcome in his The Crisis of The Mind. Significantly, both Musil and Valéry attempted to explain this kind of crisis through the analogy with economic processes: by combining their theses, and taking into account some passages of Simme...