 Few philosophers have been as famous in their own life-time as Jean-Paul Sartre (1905–80). Many thousands of Parisians packed into his public lecture, Existentialism is a Humanism, towards the end of 1945 and the culmination of World War 2. That lecture offered an accessible version of his difficult treatise, Being and Nothingness (1943), which had been published two years earlier, and it also responded to contemporary Marxist and Christian critics of Sartre’s “existentialism”. Sartre was much more than just a traditional academic philosopher, however, and this begins to explain his renown. He also wrote highly influential works of literature, inflected by philosophical concerns, like Nausea (1938), The Roads to Freedom trilogy (1945–49), and plays like No Exit (1947), Flies (1947), and Dirty Hands (1948), to name just a few. He founded and co-edited Les Temps Modernes and mobilised various forms of political protest and action. In short, he was a celebrity and public intellectual par excellence, especially in the period after Liberation through to the early 1960s. Responding to some calls to prosecute Sartre for civil disobedience, the then French President Charles de Gaulle replied that you don’t arrest Voltaire.