Modernism: A broad movement in thought, the arts, architecture, and criticism that championed the experimental, the abstract, and the avant-garde from the late 19th to the mid-20th century.
Postmodernism:A reaction against the modernist movement, postmodernism embraces fragmentation, irony, and the rejection of universal truths, often through the use of pastiche, parody, and non-linear narratives.
Formalism:An approach to the analysis of art that focuses on the formal qualities of a work, such as its composition, color, line, and texture, rather than its subject matter or cultural context.