War, what is it good for?!? Everything. Conflict makes people breathe and think and think and love and lust. If you didn't have hate you couldn't have love. If you don't have war you can never know what true peace feels like.
Complete and total world peace can only truly come if everybody and everyone agreed with everybody and everyone. It's a scary thought, scarier than war. To even have the notion or the dream that everyone and everybody will get along 100% of the time, all the time, for all time is not tangible.
I don't hope for world peace for my children, I hope for world civility and total empathy domination. That seems more likely to happen in their life time. Or so I hope.