Answer :
The root problem is human nature. Us humans keep on wanting more and more. Power, money, fame, land, resources. An example of this would be World War 2 in which the Axis all wanted more land, power, and resources. Hitler thought that Armenians were superior to other races and thought that Europe should be conquered so that it was only Armenians existed in the continent. He convinced the German people to follow and help conquer Europe. The Japanese wanted to expand their empire to a massive extend. They wanted land and resources to make the biggest Empire in the Pacific in History.
