We Shall Overcome

We Shall Overcome is a protest song that became a key anthem of the US civil rights movement. The phrase derives from a gospel song, possibly a 1903 song by Rev. Charles Tindley of Philadelphia containing the repeated line "I'll overcome some day", but more likely a later gospel song containing the line "Deep in my heart, I do believe / I'll overcome some day."
http://en.wikipedia.org/wiki/We_Shall_Overcome

Sung by many vocal groups of the Black freedom movement, jazz musicians such as Abbey Lincoln and Nina Simone sang the song in a jazz context. Drummer Max Roach wrote a jazz suite with the song as a musical theme. BLO members Josh Sperry and Marco Peris created this arrangement, which is played over an Argentinian "Murga" beat.
http://brassliberation.org/songs.php