War and Society: Is War a Cultural or Biological Phenomenon?

War is strongly ingrained into our world today whether we like it or not and while it may seem more prevalent and worse lately considering the advances in technology and the increase in hysteria over security, war is not a recent adjunct to society.   That poses the question, where does war come from?   As human beings, are we hard-wired biologically to fight each other or is it a behaviour influenced by peers and morals?
What is war? According to the thefreedictionary.com online dictionary, war is described as:
1. a. A state of open, armed, often prolonged conflict carried on between nations, states, or parties.
b. The period of such conflict.
c. The techniques and procedures of war; military science.
2. a. A condition of active antagonism or contention: a war of words; a price war.
b. A concerted effort or campaign to combat or put an end to something considered injurious: the war against acid rain.
The etymology of the word “war” can be traced back to the Old High German language word “werra” meaning strife; akin to Old High German “werran” to confuse. These words were used sometime in the 12th century.   Marcus Tullius Cicero, a Roman philosopher, once defined war as "a contention by force" and the working definition of war for the purpose of this essay will be Cicero's definition.
Our society is constantly at war.   Companies wage war against other companies with weapons of advertising, marketing, and monopoly to attract business and ultimately net higher profits.   Politicians fight battles with words and propaganda in their attempts to climb the political ladder.   People, on an individual level, attack each other in efforts to raise their socioeconomic status.   And this isn't including the wars our countries wage on each other.   Natural resources, territory, religion, political views, and   financial gain are just some of the many things wars have been fought for in the name of a country in the past and current wars are no exception.   The question is:...