Mikhail Gorbachev served as the President of the USSR from 1990 to 1991. In recognition of his outstanding services as a great reformer and world political leader who contributed greatly to the changing nature of world development, he was awarded the Nobel Peace Prize in 1990. Gorbachev’s actions created a big shift in international affairs. He contributed to a fundamental change in the international environment and played a prominent role in ending the Cold War, stopping the arms race, and eradicating the threat of nuclear war.