Postmodernism arose in response to significant historical events like World Wars and social movements in the 1960s. It rejects notions of absolute truth, universal meaning, and essentialism. Instead, postmodernism embraces fragmentation, randomness, excess, and undecidability. It favors little narratives over grand narratives and sees reality as a social construct defined through language and discourse rather than objective facts. Postmodern art and literature aim to disseminate, simulate, and pastiche other works rather than represent depth or originality.