Dadaism was an anti-art movement that began in Zurich, Switzerland between 1916-1920 in response to World War I. It rejected reason and logic and emphasized anti-war, anti-bourgeois and anti-art cultural works. Dadaists like Hugo Ball, Tristan Tzara and Emmy Hennings held public gatherings and performances to express their disgust with the war. Tzara said Dada could mean anything or nothing, depending on the viewer. The movement went on to influence later styles like Surrealism through its absurdist works and rejection of social norms.