I Am An Abolitionist
This song contains once of the best phrases that I encountered regarding the work of the modern day abolitionist community - "We'll lay the monster low, my friends. We'll lay the monster low." When reflecting on the horror of the sex trade I think "monster" as a description is apt.
While one of the more militant songs in the list, I think it is sufficiently checked by the Christian understanding of soldiers and militarism. Our fight, for example, will be fought not with violence but with the sword of the Spirit, the Word of God.