Man Ray and Jean Arp were both influential figures in the Dada art movement. Man Ray was an American-born artist who worked in photography, painting, and film, while Arp was a French-German sculptor, painter, and poet. Both artists used their work to challenge traditional artistic conventions and explore the boundaries between art and life. They were both key figures in the development of Dadaism, a movement that sought to reject the logic and reason of the modern world in favor of irrationality and chaos.