Mariachi was heavily involved in cultural promotion as a way to create a unified Mexican identity after the end of the Mexican Revolution. One of these efforts was the promotion of mariachi as an international symbol of Mexican identity, first with radio and sound recordings and later with films. Mexico built a nationwide radio broadcasting network in the 1920s such as XEB and XEW, which began broadcasting mariachi music as a media production, rather than as a music for social events. This music was already being modified in part due to the advent of sound recording. For example, most son jaliscense
El Mariachi a 73 out of 100 rating based on 9 critics, indicating "generally favorable reviews". "El Mariachi" won multiple international awards, and writer/producer/director Rodriguez went on to gain international fame; he was interviewed on such shows as "Sábado Gigante" and proceeded thereafter to secure Hollywood-backing for films such as "The Faculty" and "Sin City". In December 2011, "El Mariachi" was deemed "culturally, historically, or aesthetically significant" by the United States Library of Congress and selected for preservation in the National Film Registry. Citing it as the film that "helped usher in the independent movie boom of the early 1990s", the Registry