People might claim we shouldn't repent of the sin of slavery because, for recent immigrants, our ancestors didn't own slaves. (rachelheldevans.com)
People repented of their sins of slavery and idolatry and came to know the love of Christ. (relevantmagazine.com)
He called upon the Church to «repent of the sins of existing society, cast off the spell of lies protecting our social wrongs, have faith in a higher social order, and realize in ourselves a new type of Christian manhood which seems to overcome the evil in the present world, not by withdrawing from the world, but by revolutionizing it.» (religion-online.org)