(1) In 1985, Mikhail Gorbachev inherited a collapsing empire of Russia. Constricted by domestic pressures, he chose not to intervene when, in a few dramatic months of late 1989— and early 1990, communist governments of Eastern Europe collapsed under popular pressure and new regimes declared themselves independent of Soviet control. The fall of Berlin Wall and subsequent reunification of Germany was the most powerful symbol of change. Subsequently, Soviet Union disintegrated.The Russian President Gorbachev introduced ‘Glasnost’and ‘Perestroika’ to improve situation in Soviet Union.