The existentialist humanism which Sartre propagates in his popular essay L’Existentialisme est un humanisme (Existentialism is a Humanism), 1946, can be glimpsed in the series of novels, Les Chemins de la Liberté (The Roads to Freedom), 1945-49.
His central philosophical work, L’Etre et le néant (Being and Nothingness), 1943, is a massive structuralization of his concept of being, from which much of modern existentialism derives. The existentialist humanism which Sartre propagates in his popular essay L’Existentialisme est un humanisme (Existentialism is a Humanism), 1946, can be glimpsed in the series of novels, Les Chemins de la Liberté (The Roads to Freedom), 1945-49.