"The notion that morality must be imposed from without is not only counter-productive, it can be harmful."

Morality is relative, depending on the Society.

Some societies have had no problem ripping beating hearts out to pacify their magic sky fairies, some have had no moral problem having slaves, some have had no moral problem considering some races of people were no better than animals, and could be murdered with no moral problem... etc. In some cases, these societies were allegedly self claimed to be "Christian" ...