In different degrees, in every part of the town, men and women had been yearning for a reunion, not of the same kind for all, but for all alike ruled out. Most of them had longed intensely for an absent one, for the warmth of a body, for love, or merely a life that habit had endeared. Some, often without knowing it, suffered from being deprived of the company of friends and from their inability to get in touch with them through the usual channels of friendship—letters, trains, and boats. Others, fewer these... had desired a reunion with something they couldn’t have defined, but which seemed to them the only desirable thing on earth. For want of a better name, they sometimes called it peace.

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.