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
Alternative country The Carter Family, often cited as major influences. Another major influence was country rock, the result of fusing country music with a rock & roll sound. The artist most commonly thought to have originated country rock is Gram Parsons (who referred to his sound as "Cosmic American Music"), although Michael Nesmith, Steve Earle and Gene Clark are frequently identified as important innovators. The third factor was punk rock, which supplied an energy and DIY attitude. Attempts to combine punk and country had been pioneered by Nashville's Jason and the Scorchers, and in the 1980s Southern Californian cowpunk scene with bands