Martin du Gard’s masterpiece “Les Thibault” is set in early-20th-century France and revolves around the bourgeois brothers Antoine and Jacques. Social and religious pressures, generational conflicts, and the mounting tension before World War I are explored through realistic dialogue and detailed psychology. Published in eight volumes that total about 3,000 pages, the cycle allows readers to grow up with the characters while confronting the era’s social issues. The author’s positivist method—consulting archives, medical reports, and official records—adds documentary weight to the fiction. Questions of pacifism, Catholic doctrine, and family loyalty still resonate today, and this comprehensive human portrait earned him the Nobel Prize.

Written intermittently between 1905 and 1940, “Les Thibault” adopts the outward form of a family saga while experimenting with mixed genres such as sociological report, diary, letters, and stage-like dialogue. Martin du Gard inherited the observational rigor of Naturalism and, influenced by intellectual circles that included André Gide and Romain Rolland, placed ethical questions at the center of fiction. The elder brother Antoine pursues social commitment through medicine, whereas the younger Jacques oscillates among faith, art, and political activism. In the later volumes the story confronts wartime mobilization and anti-war movements, climaxing in the clash between individual conscience and state authority. Narrative techniques such as free indirect discourse and montage-like scene shifts create a polyphonic perspective that differs from Proustian interiority, offering a more objective realism. This synthesis contributed to the evolution of French literature and became a key reference for interwar European novels.

While retaining Zola’s positivism, Martin du Gard re-defined Romain Rolland’s concept of the “roman-fleuve.” By embedding archival material—e.g., Dreyfus-affair transcripts—into fiction, he layered historical narration with autobiographical registers, keeping diegetic and meta-narrative levels in parallel. Notably, Book VII, “Été 1914,” compresses 72 hours into over 400 pages of finely segmented scenes, anticipating Bergman-like notions of experiential time and exhibiting a modernist technique of temporal dilation. The juxtaposition of Catholic notions of sin with socialist solidarity mediates private moral law into the public sphere, foreshadowing Habermasian communicative action. These innovations move beyond plain realism and mark an epoch-making contribution to 20th-century literary history.