AB,
Prior to the onset of Christianity, the most advanced civilization in the western world had fellow human beings being torn apart in the arena of the coliseum for public entertainment. Not sure how this fits in with the evolutionary traits of moral values. Thankfully, Christian teaching promotes the virtues of love and compassion for our fellow human beings.
Given your fondness for driving a coach and four through logic, you may as well fabricate your own history too I suppose.
Not that this will impinge on your personal reality, but for what it’s worth anatomically modern humans first appear in the fossil record in Africa about 195,000 years ago. In the 193,000 years or so before the NT was produced we weren’t slaughtering each other wholesale pending a book of rules to tell us how we should behave. If we were, we would long since have died out. To the contrary, for good evolutionary reasons we developed our sense of altruism, of co-operation, of solidarity that forms the bedrock of morality: hunters worked together for better results, gatherers shared childcare etc.
Of course there was tribal warfare, cruelty etc but (as others have noted already) there were also societies the codified behaviours we would consider morally good long before Christianity showed up.
And speaking of Christianity by the way, you seem to forget that its “holy” texts contain some pretty filthy stuff too, and that in its name the crusades, the Spanish inquisition, institutionalised child abuse and many other unspeakable acts were committed too.
You can kid yourself that the morally good things we do happen because of a religious faith to which you happen to subscribe, just as you can kid yourself that you have cogent logic for that faith even though it seems you have the time only to share here your bad arguments for it. You cannot though be surprised when those with functioning intellects take the time explain to you why you are wrong on both counts.