There is nothing good about war, other than it proves one thing: That we are a human race. It is within human nature to be forgiving, caring, and understanding, but also... naive, selfish, and cruel. I'm not saying about people specifically, but people in general. To say 'A World Without War' would be... the same as maybe saying 'A World Without Human Nature'. War is something that kills many and hurts millions, all for (usually) one goal, but it's good in that it proves we are human and we will continue to be human. (And that it can stop people from bombing and nuking eachother.)