Now you might be wondering at what I'm getting at. It is simply this; what is Christianity actually for? If it feigns ignorance or appeals to 'well society didn't know any better, so neither did we' then what is it for? What values does it have, what insight does it provide on the human experience that other beliefs or non belief lack? What 'truth' can there be to the faith if it doesn't reach the truth ahead of or independently of general human progress?
The point of Christianity, the point of all worthwhile religion, is to provide men and women with fulfillment in their otherwise unfulfilling lives. Which, incidentally, is why it's unfair to judge religion entirely on its external effects, as any religion worth following should be primarily inward-looking, not outward-looking. Granted, this introspection will naturally manifest itself in people's social interactions, which is where it
is acceptable to judge someone's outward behavior, as anybody who truly seeks the righteous life will realize that the only life worth living is lived according to the Golden Rule. The extent to which a person fails to live up to the Rule is the extent to which he has fallen short of true religion.
IMHO, of course