Mikhail Sergeyevich Gorbachev was the 12th General Secretary of the
Communist Party of the Soviet Union (1985-1991) and the eighth and last President of the Soviet Union from 1990 until 1991.
Gorbachev's policies of glasnost (openness) and perestroika (restructuring) and his reorientation of Soviet strategic aims contributed to the end of the Cold War.
Gorbachev didn't intervene the fall of Berlin wall, even praised the occasion, paved the way for German reunification.