Why people has to know war? When you even hear the word itself you really can't think nothing but conflict. I believe that wars are raised because we do not understand each other. The 'what' and 'whys' aren't enough to answer what a man can't comprehend. So, one resolves everything by force and the other can't do nothing but defend what is precious to him.
One day, people will know peace where one takes time to appreciate and understand all the matters around him. An exact advocate of someone who don't want war.