Answer:
These are crucial events that have shaped our contemporary world since 1989-1990:
1. The end of the Cold War, symbolized by the fall of the Berlin Wall and the breakup of the communist sytem in Europe.
2. Globalization: The process of liberation of financial and capital flows around the world with all what it has brought: free movement of capital and investments, free trade, world interconnectedness.
3. 9/11 Terrorist attacks. The 9/11 tragic events completely changed the paradigm of security for the US and the whole world.
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