When I was a teenager a movie came out that I thought was very memorable because it was a story about standing up for what you believe in. The movie is called, 'The legend of Billy Jack'.
The song 'One tin soldier' was sang by the band Coven, as a theme song for the Billy Jack movie.
The lyrics are included in the video. Feel free to sing along with the video :) I am betting that you have a very nice singing voice, whether your family thinks so, or not ;)