Straying away from the viewpoint of modernism is postmodernism. Specifically, its a condition characterized by a questioning of the notion of progress and history, the replacement of narrative within pastiche, and multiple, perhaps even conflicting, identities resulting from disjointed affiliations. For example, a red light might have different meaning for all types of cultures. The term itself derives from the idea that he grand narratives of history are over.
Postmodernism emphasizes the role of power, relations, and language; in particular it attacks classifications such as straight vs gay, male vs female, and white vs black. Rather, it holds realities to be plural and relative, and dependent on who the interested parties are and what their interests are. Click the link below or scroll down to read about the first theory and derivative.