Mikhail S. Gorbachev, Reformist Soviet Leader, Is Dead at 91. Gorbachev, Mikhail S, Deaths (Obituaries), Politics and Government, Communism (Theory and Philosophy), International Relations, United States International Relations, Cold War Era, USSR (Former Soviet Union), Europe, Eastern Europe, Russia, Yeltsin, Boris N, Shevardnadze, Eduard A (1928-2014)