What ideologies played the greatest role in the outbreak of world war 1?

The outbreak of World War I was significantly influenced by nationalism, militarism, and Imperialism. Nationalism fostered intense rivalries among European nations, where countries sought to assert their dominance and unify their ethnic groups. Militarism led to an arms race and a belief in the inevitability of war, while imperialism heightened tensions as nations competed for colonies and resources. These ideologies intertwined, creating a volatile environment that ultimately contributed to the war's outbreak following the assassination of Archduke Franz Ferdinand in 1914.