This document discusses Mexican muralism and social art from the 1920s in the aftermath of the Mexican Revolution. It mentions several prominent Mexican artists from that era including Diego Rivera, Frida Kahlo, Jose Clemente Orozco, and David Siqueiros and some of their most famous works such as Rivera's Zapatista Landscape from 1915, Orozco's murals at Hospicio Cabañas from 1938-1939, and Siqueiros' Echo of a Scream from 1937.