Surrealist works feature the element of surprise, unexpected juxtapositions and non sequitur; however, many Surrealist artists and writers regard their work as an expression of the philosophical movement first and foremost, with the works being an artefact. Leader André Breton was explicit in his assertion that Surrealism was above all a revolutionary movement.
Surrealism developed out of the Dada activities during World War I and the most important center of the movement was Paris. From the 1920s onward, the movement spread around the globe, eventually affecting the visual arts, literature, film, and music of many countries and languages, as well as political thought and practice, philosophy, and social theory
About 1937, Ernst, a former Dadaist, began to experiment with two unpredictable processes called decalcomania andgrattage. Decalcomania is the technique of pressing a sheet of paper onto a painted surface and peeling it off again, while grattage is the process of scraping pigment across a canvas that is laid on top of a textured surface. He used a combination of these techniques in The Barbarians (1999.363.21) of 1937. This composition of sparring anthropomorphic figures in a deserted postapocalyptic landscape exemplifies the recurrent themes of violence and annihilation found in Surrealist art.
In 1927, the Belgian artist René Magritte (1898–1967) moved from Brussels to Paris and became a leading figure in the visual Surrealist movement. Influenced by de Chirico's paintings between 1910 and 1920, Magritte painted erotically explicit objects