The Causes of World War I - Class Notes
World War I, also known as the Great War, began in 1914 and lasted until 1918. It involved
many countries around the world, but mainly focused on Europe. The causes of the war
were complex and built up over many years. The four main causes are often remembered
using the acronym M.A.I.N: Militarism, Alliances, Imperialism, and Nationalism.
Militarism refers to the belief in building up strong armed forces to prepare for war. In the
early 20th century, many European countries were competing to have the strongest
military, especially Germany and Britain. This arms race created tension and a sense of
fear, as nations were ready and even eager to use their military strength.
Alliances played a major role in turning a small conflict into a global war. European powers
had formed alliances to protect themselves, such as the Triple Alliance (Germany, Austria-
Hungary, and Italy) and the Triple Entente (France, Russia, and Britain). When one country
was attacked, its allies were pulled into the fight, causing the war to spread quickly.
Imperialism was another factor, as powerful nations competed for colonies and control
over territories, especially in Africa and Asia. These rivalries increased hostility and
mistrust among the European powers. Countries were willing to go to war to protect or
expand their empires.
Nationalism is the strong belief in one's own nation and culture, sometimes at the
expense of others. In the years leading up to the war, nationalism was growing, especially
in the Balkans, where many ethnic groups wanted independence from larger empires like
Austria-Hungary. This tension eventually led to the assassination of Archduke Franz
Ferdinand of Austria-Hungary, which triggered the war.
In conclusion, World War I was caused by a combination of long-term tensions and a
single, dramatic event. The war changed the world forever and taught nations about the
dangers of unchecked nationalism, militarism, and complicated alliances. Studying these
causes helps us understand how easily a conflict can escalate and why diplomacy is so
important in maintaining peace.