Modernism began as a rejection of past ideas and cultural norms in the 19th century, driven by new ideas from evolution, psychology, and socialism. Modernism in art covered 1863-1960s and focused on new ideas and using techniques as subject matter over representing subjects. Postmodernism emerged in the 1970s from scrutiny of modernism, questioning its lack of diversity and utopian ideals. Postmodernism embraces irony, appropriation, juxtaposition, and examining bias through deconstruction.