When we discussed human rights on the first day of class, it became apparent that we needed to define the term, as we all had different conceptions of what the term means, and especially since language is largely dependent upon context. Therefore, I took a minute to lookup the definition of 'violence.' Here it is from Merriam Webster:
Violence
1 a: exertion of physical force so as to injure or abuse (as in warfare effecting illegal entry into a house) b: an instance of violent treatment or procedure2: injury by or as if by distortion, infringement, or profanation : outrage3 a: intense, turbulent, or furious and often destructive action or force b: vehement feeling or expression : fervor; also : an instance of such action or feeling c: a clashing or jarring quality : discordance4: undue alteration (as of wording or sense in editing a text)

I believe that violence of feeling, intensity of action, clashing, jarring, destructive forces- all of these are inherent in the human experience.
When it comes to physical violence, I feel that most violence would be erased if there wasn't a gaping disparity in the distribution of wealth. When people are deprived of basic human needs, it leads to a survival mentality. This is primitive and instinctual, survival of the fittest. However, as humans, we have the powers of reason to rise above our instincts. This is why those who have resources should (feel compassion for and) extend their excess resources to others who have less resources. If we are more conscious of humanity on a global scale, we open ourselves to the responsibility that comes with knowlege and exposure.
There is another thing that leads to violence apart from basic need, and that is perceived need. A person may perceive that they need more power or wealth, comfort or domain, to be happy. Power, greed, and self-indulgence are at the heart of why there continues to be disparity. Some will do anything to attain these things, disregarding the rights and needs of other humans. These people have distorted views of reality and of themselves. When it comes down to it, we are all just tiny points in space, only existing for a few years in the scheme of history. I read the other day that there have only been 29 years in all of history where there hasn't been a war going on somewhere in the world. That to me, doesn't mean that it is part of human nature, but rather that we are imperfect beings, incapable of seeing outside of our selfish needs. There would be no reason to fight if there was an equal distribution of resources (or at least a fair distribution), and if we didn't have to struggle with delusions of gradure and self-importance.