The document discusses major artistic movements in the early 20th century in response to World War I and social changes. Artists such as Picasso, Braque, and Kandinsky rebelled against realistic styles and sought to depict inner emotions over outer appearances. Styles like Cubism and Expressionism emphasized color and form over realism. Dadaism and Surrealism further rejected rationality in their anti-art works. Freud's theories also influenced thinking by exploring the unconscious mind.