According to noted religious scholar and historian of Antiquity, Jack of JPP, the emergence of Christianity had no effect on the moral and ethical framework of the Roman world; Romans had exactly the same values and ethics as the Christian apostolic church.
Now, the mainstream, midde-of-the-road, milquetoast, highly reputable Encyclopedia Britannica reports almost exactly everything I ever told Jack about this topic:
-Judeo-Christian ethics were something new and influential in western history.
-For whatever it's faults were, Judeo-Christian ethics was a significant cultural shift in the west, including the diminishment of slavery and the end of the practice of infanticide.
-The Greeks and Romans emphasized a different set of values than Christian ethics emphasized.
-For the Greco-Romans ethics were something one chose to do as a matter of practical reasoning. The Greeks and Romans did not think of a distinctively moral realm of conduct.
-For christians, ethics were legalistic, they were morally and theologically binding and immutable. That was a new kind of metaphysical vision of ethics in the west.
^^ That is what I have consistently written and that is what Encyclopedia Britannica reports.