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In page Jean Ziegler:

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While in Paris he met Jean-Paul Sartre and Simone de Beauvoir, who introduced him to Marxism, and reported on the Algerian War for their magazine Les Temps Modernes.[2] Simone de Beauvoir suggested he change his name from Hans to Jean, which she considered a more dignified byline.[2] He joined the French Communist Party which expelled him for actively supporting the Algerian independence.[2] In 1952, he met Abbé Pierre in Paris, and became the first director of the Emmaus charitable community of Geneva.[citation needed]