Poststructuralism and postmodernism challenge traditional IR theories by questioning power structures, language, and identity formation in global politics. These approaches reject positivist epistemology and emphasize the role of discourse in shaping reality. Key thinkers like Foucault, Derrida, and Butler influence poststructuralist IR, critiquing grand narratives and binary oppositions. This perspective encourages reflexivity, decolonization of IR, and exploration of alternative forms of political community beyond the state-centric model.