Below are some links to related posts I've written over the years, in case any readers are interested.
Here's a post about early Christian moral standards in general. I address what early non-Christian sources said about the early Christians and early Christian belief and practice on matters like honesty, charity, and infanticide.
Here's a post about abortion.
Here's one about homosexuality.
On polygamy, see here.
And here's one about friendship.
The post here addresses a large series of issues, including moral ones, related to what set Christianity apart in the ancient world.