I'm probably a theological outsider to this group, but my daughter (not a guitarist :-( ) attends a Christian college in Nashville and is working on a project some of you might have some insight and advice she could use.
As I understand it, she is studying Christian themes in protest music, especially music from the '60s. I thought about it, looked at some album compilations as well as my own collection, and offered the following: in the late '60s and early '70s, contemporary worship services were taking pop songs and bringing them into the church. They were secularizing the songs, which otherwise may not have had an explicit Biblical/Christian theme (e.g., "If I Had a Hammer," "Blowing in the Wind"). I was not aware at the time of a Christian-pop music culture such as exists now (when did it start?).
Some singers (Joan Baez) took Gospel songs, and either through adding verses ("A Tramp on the Street") or the context in which she performed them (songs on "David's Album") made them protest songs. By the way, my daughter's working definition of a protest song is one whose theme deals with social and political justice or injustice. I guess the Byrd's "Turn, Turn,Turn" would be an example of a song integrating Biblical teachings with a contemporary social issue (war in Viet Nam).
Do any of you have any thoughts about the connection between protest music and Biblical/Christian themes? Do you have songs (especially from the era) that would be relevant to her work, readings you could suggest (not "Render onto Caesar . . . "), or any insights? Thank you in advance.