While I think murder is a bit outside the in-built nature of human beings, I absolutely believe that <i>violence</i> in general is one of the core human behaviors. People resort to violence very often, and very quickly. Sure, there&#x27;s incentive to get the other guy or girl to back down without expending the energy of physically attacking them, but I&#x27;m not limiting my definition of violence to only be physical. Psychological violence is half of the infantry&#x27;s job, anyways. I also offer another[0] interesting story about this fact (that <i>most</i> humans will not voluntarily murder another human being).<p>[0]: <a href="http:&#x2F;&#x2F;www.historynet.com&#x2F;men-against-fire-how-many-soldiers-actually-fired-their-weapons-at-the-enemy-during-the-vietnam-war.htm" rel="nofollow">http:&#x2F;&#x2F;www.historynet.com&#x2F;men-against-fire-how-many-soldiers...</a>