Postmodern Theory is a broad intellectual movement that emerged in the mid-20th century, challenging established ideas in art, literature, and philosophy. It questions the notion of objective truth and emphasizes the subjective nature of reality, suggesting that meaning is constructed through language and culture. This theory often critiques grand narratives or ideologies, such as modernism and enlightenment rationality, arguing that they oversimplify complex human experiences. In literature and art, Postmodern Theory encourages experimentation with form and style, often blending genres and incorporating pastiche. It celebrates diversity and multiplicity, reflecting the fragmented nature of contemporary life. Key figures associated with this movement include Jean-François Lyotard and Jacques Derrida, who explored concepts like deconstruction and the instability of meaning.