It's tricky though, because the idea that humans have subverted or overcome instinct is often accepted as fact, but it's difficult to determine. It's true that we are aware of our instinct, which most likely separates us from other animals, but that could just be retroactive reasoning as a product of our relative intelligence.
The concept of morality might be purely a reinforcement mechanism, whereby actions positively contributing to the perpetuation of our species are good, with the opposite being true of unproductive behaviour.
This kind of stuff is a quagmire of confusion as far as i'm concerned. Which is why when people make absolutist claims relating to morality they need to be questioned.