One of the cafés had that brilliant idea of putting up a slogan: 'the best protection against infection is a good bottle of wine', which confirmed an already prevalent opinion that alcohol is a safeguard against infectious disease. Every night, towards 2 a.m., quite a number of drunk men, ejected from the cafés , staggered down the streets, vociferating optimism.

Soon after the event on 6 August 1945 he was one of the few French editors to publicly express opposition and disgust to the United States' dropping the atomic bomb in Hiroshima. His views contributed to the rise of the philosophy known as absurdism. To distinguish his ideas scholars sometimes refer to the Paradox of the Absurd when referring to "Camus's Absurd".

In an interview in 1945 Camus rejected any ideological associations: "No I am not an existentialist. Sartre and I are always surprised to see our names linked. In 1949 Camus founded the Group for International Liaisons within the Revolutionary Union Movement after his split with Garry Davis's Citizens of the World movement of which the surrealist André Breton was also a member.