War is always a curse for all of us. On the other hand, peace is always a blessings. So, we should always think about peace, not war. In this way, we can be deprived of war. So, there's not should be any question that where will it start from? From my perception, we should always think of peace. Then, by thinking one by one, we can bring peace instead of war.
You see how much our governments to allocate budget for it to produce and develop new weapons. A weapon not only for protection, it is to kill. Probably the correct one wise man said that if you want peace, then prepare for war.