Postmodernity (post-modernity or the postmodern condition) is the economic or cultural state or condition of society which is said to exist "after" modernity. Some schools of thought hold that modernity ended in the late 20th century – in the 1980s or early 1990s – and that it was replaced by postmodernity, and still others would extend modernity to cover the developments denoted by postmodernity, while some believe that modernity ended sometime after World War II. The idea of the post-modern condition is sometimes characterized as a culture stripped of its capacity to function in any linear or autonomous state like regressive isolationism, as opposed to the progressive mind state of modernism.