War, war never changes. War is when the young and stupid are tricked by the old and bitter into killing each other. There were many key factors into how and what started the first World War. In my opinion, I believe that the war was caused by and because of Militarism. Yes Imperialism and Nationalism were huge components into WW1 but Militarism tops the charts.
For war you are going to need soldiers to fight it for you. The nations used propaganda to lure the soldiers into fighting for them. Most soldiers believed the war would only last a couple months; and thought it’d be a fun trip with friends. Another side of the soldiers just wanted to kill some people and just come home. The war brought in a total of 70 million