A playlist (above, but not on YouTube) of 7 clips of variations on the internationally-adapted 1973 Chilean socially-conscious "!El pueblo unido jamás será vencido! (The people united will never be defeated!)":

1) Giovanni Mirabassi at the piano, along w/ accordion, bass & drums players.

2) Inti Illimani performs the classic rendition of this song.

3) Pianist Frederic Rzewski performs his own 1975 composition of 36 variations on the original song, in the last 5 clips.

The melody of the song was also adapted into Persian lyrics and became a well-known Marxist-inspired revolutionary song, known as "برپاخیز (Rise up)," in 1979 Iran.