 In an early work co-written with Marcel Mauss, "Primitive Classification", Durkheim and Mauss study "primitive" group mythology in order to argue that classification systems are collectively based and that the divisions within these systems derive from social categories.Later, Durkheim in "The Elementary Forms of the Religious Life" would elaborate his theory of knowledge, examining how language and the concepts and categories (such as space and time) used in logical thought have a sociological origin.While neither Durkheim, nor Mauss, specifically coined nor used the term 'sociology of knowledge', their work is an important first contribution to the field.