The film “Viva Zapata,” set in the Mexican state of Morelos between 1909 and 1911, portrays Emiliano Zapata, played by Marlon Brando, becoming a revolutionary leader against Porfirio Díaz, whose policies benefited wealthy landowners controlling land and water for sugarcane. Zapata cautiously aligns himself with Francisco Madero, who had Pancho Villa’s backing and offered unclear pledges regarding changes to land owne…