The document discusses several key figures and movements associated with Dada and Surrealism. It provides background on Duchamp's readymades and how they undermined assumptions about art. It describes Dada's emergence amid World War I and the nihilistic attitudes it expressed. Key ideas included incorporating chance, undermining artistic genius, and using materials like photographs for political commentary. Figures like Picabia, Schwitters, and Man Ray employed techniques like collage, assemblage, photomontage and more to challenge conventions. Dada in Berlin had left-wing political sympathies and used photomontage for social commentary, while Surrealism aimed to access the unconscious through automatism.