I feel that there are many methods that influence political power, nation’s courage, and some that lead to the cause of WWI. Many methods like Militarism, Imperialism, Assassinations, etc. are what made political power and nation’s courage from different countries distant. Nationalism is the cause of the WWI as it affects how a nation grows not only with courage, but in competitions where not all things go accordingly. First, let's talk about what Nationalism is. For example, Nationalism is the spirit of a nation as a whole or devotion and loyalty to one’s own country. How will Nationalism be a cause of WWI? Nationalism is about a crowd’s passion for a country as others will disagree which can lead to major dispute.