Postmodernism is a broad set of intellectual developments that emerged in reaction to modernism. It is characterized by celebrating fragmentation rather than lamenting it, and rejecting distinctions between high and popular art. Key figures like Habermas, Lyotard, and Baudrillard influenced postmodernist thought. Baudrillard proposed a four stage model where signs can represent reality, distort it, conceal absence, or bear no relation to reality. Postmodernism focuses on what is possible rather than searching for meaning, and emphasizes playful avoidance of meaning in art, literature and culture.