First published in France in 1937, this important essay marked a turning point in Sartre's philosophical development. Before writing it, he had been closely allied with phenomenologists such as Husserl and Heidegger. Here, however, Sartre attacked Husserl's notion of a transcendental ego. The break with Husserl, in turn, facilitated Sartre's transition from phenomenology to the existentialist doctrines of his masterwork, Being and Nothingness,...