I liked The Hello People, and Anthem was my favorite of their songs. I watched them on Dick Cavett's old morning TV show. They were frequent guests. You might want to read a little more about the group and the songwriter on this website.
http://www.thecoolgroove.com/hello.html
This video, with the intro by the Smothers Brothers, is pretty good.http://www.youtube.com/watch?v=H2MiODsMY30