Mikhail Gorbachev (1931- ) is a Russian politician He was the final premier of the Soviet Union. He enacted legislation for restructuring and openness, which were major reforms in the soviet system. He negotiated with Ronald Reagan, the president of the United States to ease tensions between the two countries. Gorbachev fell from power when the Soviet Union collapsed in 1991. Later he won the Noble Peace Prize for his efforts in ending the Cold War.