Huh? I seem to recall watching the series "Planet Earth 2" and there was some tense scenes with iguanas and snakes:

https://www.vulture.com/2017/02/planet-earth-ii-iguana-snake...

Looks like they have a predator to me.

You might have a point about war and in general consumption being a 'wired-in' behaviour. Then again assuming we have something like intelligence and free will, we should be able to choose to override some primitive behaviour.