For 22 years, the question of who represented China at the United Nations hung over world politics.

On October 25, 1971, the UN General Assembly adopted Resolution 2758. It recognized the representatives of the People's Republic of China as the only lawful representatives of China at the UN, including in its permanent seat on the Security Council, and the Republic of China's delegation lost the seat it had held since 1945.

The vote reshaped Cold War diplomacy and helped set the stage for the U.S. opening to Beijing the following year.

Which single vote do you think changed world history the most?

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