Some of the specific factors that contributed to World War 1 include:
* The rise of nationalism in Europe. Nationalism is a sense of pride in one's country and a desire to promote its interests. In the late 19th and early 20th centuries, nationalism was on the rise in Europe. This led to increased competition between the European powers and a desire to expand their empires.
* The arms race between the European powers. In the late 19th and early 20th centuries, the European powers were engaged in an arms race. This arms race was driven by fear of war and a desire to be prepared for conflict. The arms race increased tensions between the powers and made it more likely that a war would start.
* The assassination of Archduke Franz Ferdinand. Archduke Franz Ferdinand was the heir to the throne of Austria-Hungary. He was assassinated by a Serbian nationalist on June 28, 1914. The assassination of Archduke Franz Ferdinand was the spark that ignited World War 1.