“Latin America in the 1950s, 1960s, and 1970s underwent a profound and often violent process of social change. From the Cuban Revolution to the massive guerrilla movements in Argentina, Uruguay, Peru, Colombia, and most of Central America, to the democratic socialist experiment of Salvador Allende in Chile, to the increased popularity of socialist oriented parties in Uruguay, or “socialist-leaning” movements, such as the Juventud Peronista in Argentina, the idea of a really possible social change was in the air.

Although this topic has been explored from a political and social point of view, there is an aspect that has remained fairly unexplored. The cultural, and especially musical dimension of this movement, so vital in order to comprehend the extent of its emotional appeal, has not been fully documented. Literally, people put constantly their lives at risk opposing authoritarian regimes and participating in rallies to support their political parties, all the while singing militant songs that gave them the courage to do so. “There is no revolution without songs” proclaimed the huge banner installed behind the stage where newly elected President Salvador Allende (surrounded by the most important members of “Nueva Canción Chilena”—Chilean New Song) first celebrated his electoral victory in 1970.”

from https://www.google.com/books/edition/The_Militant_Song_Movement_in_Latin_Amer/kAaLAwAAQBAJ?hl=en&gbpv=1&printsec=frontcover