False, there also needs to be water involved. Plus yea, there are 4 stages
Well, Germany is not usually thought to have started it, rather a Serbian rebel, Austrian ultimatum to Serbia to catch this rebel, Serbia's refusal to let Austria enter their country and Russian support of Serbia.
After all this, Austria asked Germany to support them, and Germany did, knowing that this means fighting against the powerful Russia.
So Germany's agreement to the ongoing war turned it into a bigger conflict.
Answer:
The future presidents must prevent a nuklear war. They have to talk with each other to prevent war. With more technik being explored, the risk of a nuklear war( world war) is going up every year