What are three key events of the twentieth century that have shaped international relations today? Describe the events you choose and explain each of your choices

What will be an ideal response?

Ideal Answer: The ideal answer should include:
1. Outline what it is that makes a "key" event a key event.
2. Explain why particular chosen events were significant, not just in general, or nationally, but crucial in shaping international relations. Such events might include 9/11, the fall of Communism/the Soviet Union, World War II, World War I, The Great Depression, etc. In turn, this shaping might include the creation of new alliances, new security or trade regimes, the moving of borders, and so on.
3. By way of explaining each choice of key event, perhaps compare and contrast these events, emphasizing the particular ways in which each event shaped international relations uniquely.
4. Provide a succinct summary and conclusion.