World War One re-drew the borders of Europe and Asia. World War Two was fought because of the lines of those borders and it gave us another generation of men to use as fodder to further change the map of the world. When the cold war ended, new countries and old countries lost in WW1 and WW2 reemerged.
Now it seems, no one is happy with the current lines so must we go to war for a third time, killing another generation of men and women? And for what? Humans can make peace as well as war. We just need leaders not puppets.