After having culminated First World War the European intellectuality it felt the imperious necessity to notice new concepts for the coexistence. For this required a new identity that allowed them to traffic the warlike joint to settle down. That identity was built on the base of the pessimism that left of Nietzche's thought, as well as of the publication of the book The Decadence of West of Oswald Spengler that would mark the courses of that new identity. Important writers clinged to that idea, fundamentally during the decade of 20 in last century. Hesse, Proust, Mann, Eliot, Pirandello, Kafka, among other, knitted from its works published between 1920 and 1930 a dismayed atmosphere of which the bases of that necessary new world would be born.