Primitive society was not driven by war.

[Jim Johnson]

Researchers from Abo Academy University in Finland say that violence in early human communities was driven by personal conflicts rather than large-scale battles.

They say their findings suggest that war is not an innate part of human nature, but rather a behaviour that we have adopted more recently.

The study is published in the journal Science.

Patrik Soderberg, an author of the study, said: "This research questions the idea that war was ever-present in our ancestral past. It paints another picture where the quarrels and aggression were primarily about interpersonal motives instead of groups fighting against each other."

http://www.bbc.co.uk/news/science-environment-23340252

[Jim Johnson]

One needs wealth to have a war. 

Wealthy people risk to much by starting a war.

Politicians risk little of their own wealth starting a war and would gain more wealth in risking that little.  Politicians gain a great deal from a limited war, in which case they would risk even less.

[Tom Sawyer]

Taxes = War

Without forced taxation kind of hard to fund any kind of large scale warfare.

[Russell Kanning]

Seems like world war is a new thing but perpetual war has been slowly building