There are many causes that has to do with the great war. Imperialism, nationalism, and militarism have to do with the great war. However, the great war raged from 1914 to 1918 it amazingly shocked people with its destruction. It involved many more nations, used more advanced weapons and resulted more deaths than any usual deaths in any wars. The great war was more than a war. It was a destruction. Which is why it was named world war 1. World war 1, is how you could say world wars began. The causes of world war that after the defeat of napoleon, Europe had no major outbreaks of war for almost 100 years. Nationalism was such a powerful force I the Balkan region, and consisted a lot of different ethnic groups. The four main causes of world war