I get where you're coming from, but modern society is clearly pushing us away from our own nature in this instance, not towards it. To establish this, we just

I get where you're coming from, but modern society is clearly pushing us away from our own nature in this instance, not towards it. To establish this, we just need to ask the question of what would happen if the explicit state punishments for murder, rape, etc were removed. The rates would increase significantly, implying that the existence of these measures is attenuating behaviour that's otherwise rather natural. If chimps received an electric shock each time they tried to murder another chimp, would they murder less often? Yes, because that shock is attenuating their true nature. Admittedly, "human nature" is a rather fuzzy concept and isn't a scientifically precise term.