Abstract

This paper shows that moral progress is a substantive and plausible idea. Moral progress in belief involves deepening our grasp of existing moral concepts, while moral progress in practices involves realizing deepened moral understandings in behavior or social institutions. Moral insights could not be assimilated or widely disseminated if they involved devising and applying totally new moral concepts. Thus, it is argued, moral failures of past societies cannot be explained by appeal to ignorance of new moral ideas, but must be understood as resulting from refusals to subject social practices to critical scrutiny. Moral philosophy is not the main vehicle for disseminating morally progressive insights, though it has an important role in processes that lead to moral progress. Yet we have grounds for cautious optimism, since progressive moral insights can be disseminated and can, sometimes, have constructive social effects.