1) Modernism emerged in the early 20th century and questioned traditional modes of social organization, religion, morality, and concepts of self through thinkers like Nietzsche, Marx, Freud, and Frazer.
2) Modernist works like Joyce's Ulysses and Eliot's The Waste Land experimented with form in response to a fragmented social order. Techniques included automatic writing, Cubism, and Futurism.
3) Postmodernism arose after World War 2 and further extended modernist experiments while also incorporating mass culture influences from film, television, and popular music to challenge elitism.