The question asks which factor was not a cause of World War I, with the correct answer being Diplomacy. Militarism, Alliances, and Imperialism were significant causes that contributed to the war. Diplomacy, while attempting to manage conflicts, ultimately did not prevent the war from occurring. ;
The factor that was not a cause of World War I is Diplomacy . Militarism, Alliances, and Imperialism all played significant roles in leading to the war. Diplomacy, in this context, failed to prevent the outbreak of conflict.
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