In the social sciences there is a standing debate over the primacy of structure or agency in shaping human behavior. Structure is the recurrent patterned arrangements which influence or limit the choices and opportunities available.Agency is the capacity of individuals to act independently and to make their own free choices. The structure versus agency debate may be understood as an issue of socialization against autonomy in determining whether an individual acts as a free agent or in a manner dictated by social structure.
The debate over the primacy of structure or of agency relates to an issue at the heart of both classical and contemporary sociological theory: the question of social ontology: "What is the social world made of?" "What is a cause of the social world, and what is an effect?" "Do social structures determine an individual's behavior or does human agency?"
Structural functionalists such as Émile Durkheim see structure and hierarchy as essential in establishing the very existence of society. Theorists such as Karl Marx, by contrast, emphasize that the social structure can act to the detriment of the majority of individuals in a society. In both these instances "structure" may refer to something both material (or "economic") and cultural (i.e. related to norms, customs, traditions and ideologies).
Some theorists put forward that what we know as our social existence is largely determined by the overall structure of society. The perceived agency of individuals can also mostly be explained by the operation of this structure. Theoretical systems aligned with this view include: