Which of the following is a long-term cause of World War II?

• A. The invasion of Poland
• B. The rise of fascist ideology and dictatorships
• C. The Munich Agreement
• D. The failure of the League of Nations

Answer: (B)

Long-term causes are the deep, enduring forces that shape events over many years. The rise of fascist ideology and dictatorships created a climate of aggressive nationalism, militarism, and a willingness to break international norms to gain territory. In Germany, Italy, and Japan, leaders promoted expansionist aims and suppressed opposition, which steadily built the capability and the will for war. This pattern of beliefs and state behavior developed across the 1920s and 1930s, setting the stage for a large-scale conflict.

The other options describe events or policy choices that acted as triggers or responses in the moment rather than foundational drivers. Invasion of Poland was the immediate spark that started the war; the Munich Agreement reflects a diplomatic move aimed at appeasement rather than a lasting cause; and while the League of Nations’ weaknesses mattered, the persistent rise of fascist regimes is the clearer, overarching long-term factor that pushed the world toward war.