Rivera, a Mexican painter who also worked in the USA. Rivera and artist wife Frida Kahlo had strong socialist values, owing to their identification with Mexico's rural poor and oppressed. these values are visually represented in their work, especially in Rivera's murals. http://www.moma.org/interactives/exhibitions/2011/rivera/intro.php . Rivera's paintings also indicate his interests in modernist art movements such as Post-impressionism, Cubism and Surrealism.