Green cloth spine with gilt title and decoration. Tan cloth boards.

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by Sartre, Jean-Paul, Caute, David, Sutton, Eric | Modern & contemporary fiction (post c 1945). Published 22/02/2001 by Penguin Books Ltd (Penguin Classics) in the United Kingdom as part of the Penguin Modern Classics series. Paperback | 320 pages

The Age of Reason (French: L’âge de raison) is a 1945 novel by the philosopher Jean-Paul Sartre. It is the first part of the trilogy The Roads to Freedom. The novel, set in the bohemian Paris of 1938, focuses on three days in the life of philosophy teacher Mathieu who is seeking money to pay for an abortion for his mistress, Marcelle. Sartre analyses the motives of various characters and their actions and takes into account the perceptions of others to give the reader a comprehensive picture of the main character.

The Age of Reason is concerned with Sartre’s conception of freedom as the ultimate aim of human existence. The work seeks to illustrate the existentialist notion of ultimate freedom through presenting a detailed account of the characters’ psychologies as they are forced to make significant decisions in their lives. As the novel progresses, character narratives espouse Sartre’s view of what it means to be free and how one operates within the framework of society with this philosophy. The novel is a fictional reprise of some of the main themes in his major philosophical study Being and Nothingness (1943). One of the notions is that ultimately a person’s freedom is unassailable as it is fundamentally part of the nothingness that is the imagination and so cannot be taken away or destroyed.

The New York Times review stated “There is, indeed, something more in The Age of Reason than an exciting novel and a philosophical problem. As a somber background to Mathieu’s private dilemma, Sartre presents a picture of the war in Spain and of the eve of the war in Europe.”

The Harvard Crimson published an unattributed review of the book which states “Sartre’s new novel is a rare and welcome plant in a period that almost completely lacks a balanced combination of emotional intensity and maturity in its writers.” However, the review goes on to remark how Sartre seems to be preoccupied with describing the physical act of vomiting. 

Jean-Paul Charles Aymard Sartre (21 June 1905 – 15 April 1980) was a French philosopher, playwright, novelist, screenwriter, political activist, biographer, and literary critic, considered a leading figure in 20th-century French philosophy and Marxism. Sartre was one of the key figures in the philosophy of existentialism (and phenomenology) and was a proponent of Libertarian Marxism. His work has influenced sociology, critical theory, post-colonial theory, and literary studies. He was awarded the 1964 Nobel Prize in Literature despite attempting to refuse it, saying that he always declined official honors and that “a writer should not allow himself to be turned into an institution.”

Sartre had an open relationship with prominent feminist and fellow existentialist philosopher Simone de Beauvoir. Together, Sartre and de Beauvoir challenged the cultural and social assumptions and expectations of their upbringings, which they considered bourgeois, in both lifestyles and thought. The conflict between oppressive, spiritually destructive conformity (mauvaise foi, literally, ‘bad faith’) and an “authentic” way of “being” became the dominant theme of Sartre’s early work, a theme embodied in his principal philosophical work Being and Nothingness (L’Être et le Néant, 1943). Sartre provided an introduction to his philosophy in his work Existentialism Is a Humanism (L’existentialisme est un humanisme, 1946), originally presented as a lecture.

Born in Paris, Sartre lost his father at age two and was raised primarily by his mother and grandfather, who introduced him to literature. He studied at the prestigious École Normale Supérieure, where he developed a deep interest in philosophy, influenced by thinkers like Henri Bergson, Edmund Husserl, and Martin Heidegger. Sartre’s early academic career included teaching in several French lycées and engaging in provocative pranks and debates.

Sartre’s life was marked by strong political engagement. During World War II, he was drafted, captured, and later released, after which he co-founded the resistance group Socialisme et Liberté. Though the group dissolved, Sartre became an influential voice in occupied France, contributing to underground literature and writing plays like No Exit. After the war, he co-founded the journal Les Temps modernes and increasingly used his platform to advocate for political and social causes. He supported anti-colonial movements, condemned French policies in Algeria, opposed U.S. intervention in Vietnam, and aligned himself at various times with Marxism and Maoism. Despite declining health in his later years, Sartre remained committed to activism and intellectual debate until his death in 1980. His funeral drew 50,000 mourners.