The Dada art movement originated as a protest against World War I and the social disorder of that time. Dada artists experimented with new forms of art like collage, photomontage, readymades, and assemblage that incorporated everyday objects and images in unconventional ways. They sought to challenge conventional views of art and shed light on what they saw as hypocrisy. Key figures like Marcel Duchamp and Hannah Hoch pioneered these new techniques that have continued influencing art and design to this day.