Postmodernism was a reaction against modernism. Modernism was generally based on idealism and a utopian vision of human life and society and a belief in progress. It assumed that certain ultimate universal principles or truths such as those formulated by religion or science could be used to understand or explain reality. Modernist artists experimented with form, technique and processes rather than focusing on subjects, believing they could find a way of purely reflecting the modern world. While modernism was based on idealism and reason, postmodernism was born of scepticism and a suspicion of reason. It challenged the notion that there are universal certainties or truths. Postmodern art drew on philosophy of the mid to late twentieth century, and advocated that individual experience and interpretation of our experience was more concrete than abstract principles. While the modernists championed clarity and simplicity; postmodernism embraced complex and often contradictory layers of meaning.