Sample response: The four general causes leading to World War I were nationalism, imperialism, militarism, and alliances. Nationalism caused many small countries to rebel against imperialism and seek their independence. A focus on militarism meant that they had the means to cause great harm.
The final event that led to the beginning of the war was the assassination of Austria-Hungary's Archduke Ferdinand. Once Austria declared war on Serbia, the alliances that had been agreed to over the preceding years obligated several other countries to go to war.
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