We need Wars, and battles. Without war, the economy could crash in a few years. World peace would be nice, but it would ultimately destroy everything. It dates back to the old Yin, & Yang. Every Action needs a reaction. Without war, nothing would change. Some countries struggle to start a war against its dictatorship. Wars are massive catalysts towards change. We need change to live like an actual person. If you have ever read the book "The Giver" that proves my point. I would be all for world peace if it didnt mean we would be obliterated because of it.