L'Express
Servan-Schreiber was among the first to recognize the inevitability of decolonization, writing a series of articles on the Indo-Chinese conflict. This led to his meeting the future Prime Minister Pierre Mendès-France, at that time a dedicated opponent of the French military effort in Indo-China. In 1953 Servan-Schreiber co-founded (with Françoise Giroud) the weekly L'Express, initially published as a Saturday supplement to the family-owned newspaper Les Échos. On the magazine's open agenda was the elevation of Mendès-France to power. Due to government seizures and censorship, the magazine quickly enchanted both the youth and the most prominent intellectuals of the 1950s and 1960s with its innovations. Among its contributors were Albert Camus, Jean-Paul Sartre, André Malraux and François Mauriac. During Mendès-France's pivotal eight-month term as Council President (the formal title for the Prime Minister during the Fourth Republic), JJSS served him as a shadow councilor.
Servan-Schreiber was conscripted to Algeria in 1956 – to still his dissent, says Giroud. Drawing on his experiences there, he published his first book, "Lieutenant en Algérie". Its account of the brutality of French repression caused a controversy over its alleged deleterious effect on the army's morale. L'Express ran excerpts from the book.
Servan-Schreiber opposed General De Gaulle's return to power in 1958. However, De Gaulle was successful, and the influence of L'Express began to wane. In the same period, JJSS experienced other upsets. His family lost control of Les Échos; he split politically with Mendès-France; he divorced his first wife, and separated from Françoise Giroud, his mistress since the early 1950s, in order to marry Sabine Becq de Fouquières, who would become the mother of his four sons David, Émile, Franklin, and Édouard.
In 1964 following a study which he commissioned from his brother Jean-Louis, JJSS transformed L'Express into a weekly news magazine patterned after TIME. L'Express soared in popularity once again. It broadened its coverage to such subjects as new technologies and women's liberation. It became a mirror of the changing French society.