David Alfaro Siqueiros
David Alfaro Siqueiros (Ciudad Camargo, Chihuahua, 1896 - Cuernavaca, Morelos, 1974) Mexican Social Realist Muralist. Along with Diego Rivera and José Clemente Orozco (the "Big Three"), Siqueiros was one of the most important artists in the Mexican mural movement.  Mexican muralism started during the first decades of the XX century... The murals of Siqueiros are characterized by an imposing strength and an esthetic full of drama and color.  Siqueiros was also a life-long political activist, a Communist, veteran of the Mexican Revolution and Spanish Civil War; because of his political activism he was several times in prision. Issac Deutscher describes him as a man in whom "art, revolution and gangsterism were inseparable." 
Siqueiros' first mural, The Elements (1922), was painted in a stairway of the National Preparatory School. Some of his most important works are: "Portrait of Eugene Jolas", c. 1936, "Proceso al fascismo", 1939, "Retrato de la Burguesía", 1939-1940, "Muerte al Invasor, 1942, "Alegoría de la Igualdad Racial en Cuba", 1944, "El Coronelazo", 1945, "La Nueva Democracia", 1944-1945, "Patricios y Patricidas", 1946, "Nuestra Imagen Actual", 1947, "Cuauhtémoc Contra el Mito" ca. 1964, and "Marcha de la Humanidad", 1971. His painting portrayed his ideals of nationalism.
Although he is most recognized for his murals inspired by the Mexican Revolution, Siqueiros´s artistic interests were exceptionally varied and included the idea of mechanical motion of futurism, as well as the concept of montage 
- El Muralismo Mexicano In Spanish.
- David Alfaro Siqueiros ARTCYCLOPEDIA.
- THE ARTIST AS ACTIVIST: DAVID ALFARO SIQUEIROS
- Polyforum Siqueiros