Pure Peace Possible ?

[Xiahou]

A lion kills for food- so do we. Also, lions, wolves, even simple jellyfish kill each other for control of territory and resources. You don't even have to consider predation. A lion will kill another because it has come onto his pride's territory or it may be killed itself by another lion who wants control of his territory and mates. The victor will the proceed to kill all of the young who are not it's own decendants. Wolf packs can completely wipe out rival packs in bids to take over their territory.

Even simple Anemones that float on the tides exist in a constant state of 'warfare' with colonies attacking and killing each other with every tide.