What were the main factors responsible for World War I?

The main factors responsible for World War I were:

• Nationalism and imperialism: Nationalism is a sense of national identity and unity. Imperialism is the policy of extending a country’s power and influence through colonization, use of military force, or other means. Both nationalism and imperialism can lead to conflict between countries, as each country seeks to expand its power and influence.
• Militarism and entangling alliances: Militarism is a policy of aggressive military preparedness. Entangling alliances are agreements between countries to come to each other’s aid in the event of war. Both militarism and entangling alliances can increase the risk of war, as they make it more likely that countries will go to war to defend their interests.
• Mutual rivalry, hatred and distrust within the countries: Mutual rivalry, hatred and distrust within the countries can lead to conflict. This was the case in Europe before World War I, where there was a great deal of rivalry between the major powers. This rivalry was fueled by nationalism, imperialism, and militarism.

All of these factors contributed to the outbreak of World War I.