For Engels, the Peasants' War was the first major class conflict in German history and a forerunner of later revolutionary struggles. He sees in it important lessons about the role of class, leadership and ideology in revolutionary movements.
In "Letter on Humanism" (1947), Martin Heidegger answers Jean Beaufret's question about the meaning of humanism, presenting a critical stance towards traditional humanism and offering a new understanding of human existence.
"Logos and Absurd" is a collection of seven philosophical studies by Croatian philosopher Daniel Bučan, in which the author explores the ontological meaning of logos – words, reason, and order – in contrast to absurdity as a tragic experience of life.