No matter the era, war has never been completely eradicated, because the reality of it has always been important to humans. The reality of someone fighting somewhere, even now, is a necessity in the human social system. And that need can never be fulfilled by lies. It's not enough to read what wars are like in textbook stories. The reality of people dying, the reports of that news on the TV: we can't maintain peace without seeing those tragedies. We would cease to understand the meaning of peace.