His most famous books are Primitive Society (1920), Culture and Ethnology (1917), History of Ethnological Theory (1937), Primitive Religion (1924), Are We Civilized (1929), Introduction to Cultural Anthropology (1934), The German People (1945), and Toward Understanding Germany (1954). He even contributed 33 papers to Selected Papers in Anthropology (1960) between the years 1911 and 1957.