[DittoJed2]

Evolution contradicts a literal reading of your personal favorite creation story. It does not contradict any moral teaching, per se.
It has no basis for moral teaching other than preference. You can choose to be a Mother Teresa or a Hitler and there is no foundation other than preference to say that you are wrong. Evolution produces a relativistic society because it makes man equal with animals, evolved from primordial goo, with no real dibs on any moral claim. IF your society says Hitler was a genocidal monster, according to that opinion, you can prosecute him by the rules of that society. However, another society may beg to differ. Without an immovable moral law, given by one higher than human beings, then you have an unstable democracy - at best.

[Dimensio]

It has no basis for moral teaching other than preference.

Nor does gravitational theory. You are insisting that it is either nihilistic evolution or Biblical creationism, but that's a false dichotomy. You are so stuck in your false dilemma that you refuse to admit that evolution does not rule out the existence of a god as a moral lawgiver.

Evolution makes no claims as to the existence of a moral lawgiver. That it doesn't correspond exactly to you preferred creation myth doesn't matter -- your creation story isn't the only one out there, and it's not the foundation for everyone's moral beliefs.