Peaceful world without war is impossible?

Summary

Psychological theories

 Psychologists have argued that while human temperament allows wars to occur, they only do so when mentally unbalanced men are in control of a nation. Such as Napoleon, Hitler, and Stalin were mentally abnormal.

IN KOREA The Korean Peninsula during the war

Is a region where the Cold War has been realized at the very beginning, is a region that has experienced the pain of the maximum of the Cold War, the Korean Peninsula is an area where the Cold War was still going on.
Truce is maintained for more than 50 years, but the threat of war is not reduced easily.

Why war happens

The history of mankind is called the history of war. War has been in step with the history of mankind.
So, I think people as being present and of course that it is not possible to avoid war.
But what would be really so?
The reason that happens terrible reckless war followed, there is a person or group to benefit through the war.

my opinion

Life of even one person maybe, it's the history of the war. The process of striving for employment and college entrance examination is similar to a kind of war. Mental effort to ablate with reference that you want to achieve the goals is a war.