Why Did World War I Break Out in 1914?

In this essay I'm going to be explaining the causes of WWI. There are four main causes of WWI. They are Nationalism, Imperialism, Militarism and Alliances. The assassination of Archduke Ferdinand was only the "spark" which set off the "barrel of gunpowder". The four causes had created so much tension in Europe that it only needed one event to trigger the war. I will break down the four causes into long term, medium term and short term. The first long term cause is Nationalism.
Nationalism is the belief that one's own country is the best in the world. The problem with this belief is that one looks down on other countries, and vice versa.…