not a single theory but rather a range of reactions to modernism and its assumptions. It rejects the idea of an all-embracing grand narrative a single theory or principle that explains all human endeavour. It doubts the objectivity of science for example is sceptical of anything thought of as foundational essential or necessary instead preferring to accept a variety of perspectives none of which can be privileged. In the arts the term refers more to an eclectic approach which rejects traditional forms and disciplines.