Is the act of violence
We were talking specifically about aggression, no? Aggression is not equivalent to violence, just as violence is not equivalent to death.

Physiological arousal.

Quote Originally Posted by Horetore
In order words, the outside factors an individual is exposed to, mediated by individual neurophysiology will determine its level of aggression?
Then you are already a believer of violence in society as a consequence of a set of factors, rather than as something that must always be present
The release of gastric acids, a component of the digestive process: how do you remove all factors that contribute to the stimulation of the Vagus nerve, as well as the lesser components of digestion? How is it possible to eliminate every stimulus that engenders even the thought of food, which is even so enough stimulation?

And if a set of factors can result in permanent war, then another set of factors which brings permanent peace must exist, right?
What set of factors can result in permanent war? The problem here is that we're talking about humans, not some mythical - actually, Strike has given me an idea:

It's like you construct humans in your head and go no further.