It might be the best song I've heard this year: "Precious Puritans" by Propaganda. Joe Thorn has done a great service through his two posts on the song, the history behind it, and how Propaganda brought it all together to make a very important point
Post 1: Interview with historian (and my friend) Richard Bailey on the content "Precious Puritans," especially on the Puritans and slavery that is at the heart of the song.
Post 2: Play the song, read the lyrics, read thoughts from Propaganda.
You should buy this album or grab it free. The whole album is, well, Excellent. And don't miss the music and sounds of "Precious Puritans." The classical cello sounds, slave ships and ocean sounds, amazing.