Religions and social morality promotes progessive reforms by creating a certain standard of right and wrong that could be accepted by society.
For example, there was a time in human society when we won't feel any remorse in challenging someone we don't like into a duel and killed him/her.
Religions and social morality view this as a 'wrong behavior' and as time goes by almost all poeple in society believe the act of killing in anyway is considered as wron (this include as a progressive phenomenon in soicety)