Alfred Schutz (1899-1959) stood simultaneously in the camps of philosophy and sociology, and his writings constitute the framework of a sociology based on phenomenological considerations. Schutz's basic contributions issue from a critical synthesis of Husserl's phenomenology and Weber's sociology of understanding. He proceeds on the basis of the irreducible souce of all human knowledge in the immediate experiences of the conscious, alert, and active individual. In this volume Helmut Wagner has selected and skillfully correlated various passages both from Schutz's book The Phenomenology of the Social World and from his scattered papers and essays.