Why did tensions among industrialized nations rise in the years leading up to world war 1?

Tensions among industrialized nations rose in the years leading up to World War I due to a combination of militarism, nationalism, and imperial competition. Countries engaged in an arms race, building up their military capabilities in response to perceived threats. Nationalistic fervor fostered rivalries, particularly in regions like the Balkans, where ethnic tensions were high. Additionally, competition for colonies and resources heightened conflicts, ultimately leading to alliances that created a volatile geopolitical landscape.