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Identify the four MAIN causes of World War I, and explain how they contributed to the start of the war. Then, explain which of the four causes you think had the greatest impact in starting the war, and why. (6-8 sentences)

Answer :

There were actually four HUGE causes for WW1, treaties and alliances brought many countries into war, the imperialism of some countries scared other countries, and they were "defending" themselves, there was a lot of weapons stocking, and countries were creating gigantic armies, and that threatened other countries, and then we have plain old nationalism.