To me, this sounds like a naturalistic fallacy. "It's nature, so it's morally correct."

Point to many other system in nature which is advanced as human social interactions which include language, law, contracts, etc, etc.

Sorry, I don't buy it. Chimps are violent, no doubt about it. We evolved to dominate the world because of our cooperation. There's a whole back story to this relating to the whites of our eyes, the size of our brains and the limitation of hips requiring a more nurturing, cooperative community to protect and nurture new borns, etc.

The human brain is special and cooking (pre-digesting our food) to create a high neuron count per calorie had a lot to do with that: https://www.ted.com/talks/suzana_herculano_houzel_what_is_so_special_about_the_human_brain