Henri Barbusse (1873 – 1935) was a French novelist, Communist Party member, and lifelong friend of Albert Einstein.
He was editor of Clarté, the periodicals Monde (1928–1935) and Progrès Civique, which published some of George Orwell's first writings. He was also literary editor for the daily newspaper l'Humanité from 1926 to 1929. He led the World Congress Against Imperialist War (Amsterdam, 1932) and headed the World Committee Against War and Fascism, founded in 1933. He also took part in the work of the International Youth Congress (Paris, 1933) and the International Congress of Writers in Defence of Culture.
Barbusse was the author of a 1936 biography of Joseph Stalin, titled Staline: Un monde nouveau vu à travers un homme (Stalin. A New World Seen Through the Man). Barbusse was an Esperantist, and was honorary president of the first congress of the Sennacieca Asocio Tutmonda. While writing a second biography of Stalin in Moscow, Barbusse fell ill with pneumonia and died on 30 August 1935. His funeral drew 500,000 people and he is buried at the Père Lachaise Cemetery in Paris.