Raíces de sangre (Spanish pronunciation: [raˈises de ˈsaŋɡɾe]) (Roots of Blood) is a Mexican movie written and directed by Jesús Salvador Treviño released in 1978 in Mexico and other countries. According to some sources, it had a wide release on May 30, 1979, but other sources show it was playing in US theaters as early as August 1978.The film deals with labor relations and tensions between Mexican and Chicano workers. It has received praise as a foundational work in Latin American cinema.