Cultural studies combines a variety of politically engaged critical approaches drawn from and including semiotics, Marxism, feminist theory, ethnography, critical race theory, poststructuralism, postcolonialism, social theory, political theory, history, philosophy, literary theory, media theory, film/video studies, communication studies, political economy, translation studies, museum studies and art history/criticism to study cultural phenomena in various societies and historical periods. Thus, cultural studies seeks to understand how meaning is generated, disseminated, contested, bound up with systems of power and control, and produced from the social, political and economic spheres within a particular social formation or conjuncture. Important theories of cultural hegemony and agency have both influenced and been developed by the cultural studies movement, as have many recent major communication theories and agendas, such as those that attempt to explain and analyze the cultural forces related to processes of globalization.