was also a member of a group called the Mural Block Painters along with Jean Abel, Jackson Pollock, Dean Cornwell and Radich. In 1933, he returned to Mexico where his work took a more political bent. He first became the general secretary of a group called the Mexican League Against War and Fascism. In 1934, he was a founding member and first secretary of the Liga de Escritores y Artistas Revolucionarios in 1933. He worked to create propaganda against war and fascism and supporting communism, founding the group's magazine Frente a Frente in 1935 along with Juan de la Cabada. In 1936, he went to New York for a political meeting and stayed until 1937, painting murals at Bellevue Hospital Center and exhibiting his work. When he returned in 1937, he founded the Taller de Gráfica Popular with Leopoldo Méndez and Pablo O'Higgins, taking part in all of the collective exhibitions of the organization. From 1937 through most of the 1940s, he did various murals and other monumental works. In 1939-40, he worked with Siqueiros on the murals Retrato de la Burguesía, at the Sindicato Mexicano de Electricistas along with Josep Renau, Antonio Pujol, Antonio Rodríguez Luna and Miguel Prieto . From 1944 to 1945 he created two sculptures, one in stone and the other in concrete to complement a Siqueiros mural at the Centro de Arte Moderno in Mexico City called Cuauhtémoc contra el mito. From 1946 to 1947 he worked on construction projects in the state of Guerrero. He also created a monument in Cuetzala del Progreso, Guerrero. In 1948, he created a mural on Masonite panels for a rural school in Arcelia, Guerrero. He painted the stairwell of the Guerrero state government palace from 1949 to 1952. In 1949 he founded a magazine called 1945-1946, acting as the head of writing and graphic design. That same year, he also created the engravings for a book called "Estampas de Guerrero." He was a founding member of the Salón de la Plástica Mexicana . In 1955, he was one of the founders of the Instituto Regional de Bellas Artes in Acapulco. He collaborated with David Alfaro Siqueiros on the murals at the Polyforum Cultural Siqueiros from 1964 to 1970. From 1972 to 1976 he created the Cabeza de Juárez monument in Iztapalapa along with architect Lorenzo Carrasco, as his last major work. The piece is thirteen meters high and