Interpellation is a concept discussed by Marxists in reference to ideology. Marxist classics refer to this as the state apparatus. However, it was philosopher Louis Althusser who first used the term Interpellation see (Althusser Louis, 1970, Essays on Ideology, Page 11, Verso) to describe the process by which ideology addresses the (abstract) pre-ideological individual thus effectively producing him or her as subject proper. Henceforth, Althusser goes against the classical definition of the subject as cause and substance: in other words, the situation always precedes the (individual or collective) subject, which precisely as subject is "always-already interpellated". Althusser's argument here strongly draws from Jacques Lacan's concept of the Mirror stage. Althusser's concept has been roundly confused over the last decades with concepts and thinking associated with Michel Foucault, in part because both thinkers manifest an antihumanist insistence on the secondary status of the subject as mere effect of social relations and not vice versa. Another source of this confusion, as elaborated in an article by Keith Sawyer (2002) is the shared use of the word but different concepts of discourse. Interpellation, Althusser's idea based on Lacan, specifically involves the moment and process of recognition of interaction with the ideology at hand. Foucault eschews the notion of ideology and his quasi-structuralist analytics are quite antithetical to Lacanian notions of Real, Symbolic, Imaginary.