ABSTRACT
Henri Bergson coined the term “open society” in The Two Sources of Morality and Religion, his last important book, published in 1932. At that time, he was no longer “the most celebrated philosopher in the world,” despite his Nobel Prize, awarded in 1928. Extremely productive during the pre–First World War decade, and very active in diplomacy and politics during the war and its aftermath, Bergson became quite silent after 1923, when he tried to challenge Einstein in Duration and Simultaneity: it was a bold but unsuccessful attempt to engage philosophically with a scientific revolution in physics.
