I've noticed that people tend to prefer moral relativism to moral absolutism because of the idea of moral progress. Moral progress is the notion that the world is on a trajectory towards a better and better understanding of what the right thing to do is.
Morality as being socially constructed seems to harmonize better with moral progress than a fixed, unchanging morality. However, while I believe in moral absolutes myself, I also believe in some version of the moral progress idea, although with serious qualifications. (i.e. I believe that moral progress can over time result from our efforts to faithfully live out God's Word).
I would like to know of any resources where people have reconciled the idea of moral absolutes with the idea of moral progress, from a Christian perspective.