Tread title is question.
SCENARIO: Let's say that you have to make an extremely important decision. You have the forces, weaponry, and manpower to do this.
-You will wage an incredibly destructive war, devastating the world and its population, but in the aftermath, all of humanity once and for all will be united, world peace forever will be obtained.
-You do NOT wage war. The world and its population are not devastated, but humans will continue to war against each other in much smaller (although still brutal) wars in the centuries to come.
What would you do?