The subject of the current research work is the construction of the dominant identity of space and subjects, through the achievement of "purity" and the introduction of "order" as tools for social reproduction. The concept of "purity" is approached through Mary Douglas's analysis of impurity, "matter out of place," as a residual structure that is rejected by the taxonomic scheme and is at the same time its inherent derivative. The pure and the dirty are chosen, not as characteristics of matter, but as mental constructions that produce bans, exclusions and displacements both in space and in subjects. At the same time, in order to understand the dominant character of the space and the perceptions of identities, theories from various fields of study such as sociology, anthropology, ethnological studies, psychoanalytic theory and their intersections are used. The position under consideration is how the system uses "matter out place" as a mental construction in order to make the identity of space and subjects "clean".

The text’s structure is based on theories which apply on episodes of spaces, practices and perceptions, shaping their dominant character. Initially, the map is chosen as the representation of space, which is considered an objective tool of knowledge and is degraded to the logic that it constructs "pure" spatial relationships based on selfish purposes. Then, in the city's field, the concept of "purity" is used in order to show the disciplinary and rational character of public space. As for the identity of the bodies, the case of the subject in migration is chosen to understand how the attribution of "dirty" characteristics on identity supports social reproduction. Finally, with the aim of forming an additional level of perception for the concept of "purity", the taboo is chosen as an internal law which organizes the structure and social relations of cultures, which in western thinking, appear as "primitive".