What added rivalry among countries long before world war1?

Long before World War I, rivalries among countries were intensified by Imperialism, nationalism, and militarism. The scramble for colonies in Africa and Asia fostered competition among European powers, particularly between Britain, France, and Germany. Nationalist sentiments also surged, as various ethnic groups sought independence and greater power, leading to tensions, especially in the Balkans. Additionally, the arms race and military alliances, such as the Triple Entente and the Triple Alliance, further heightened these rivalries, setting the stage for the eventual outbreak of the war.