His perestroika changed global politics, ended the Cold War, and won him a Nobel Peace Prize.
I left my hometown, Nizhny Novgorod, as a teenager in the midst of perestroika.
Of course, in Russia at that time you had just the beginning of Gorbachev, and glasnost and perestroika.
1981, from Russian perestroika, literally "rebuilding, reconstruction, reform" (of Soviet society, etc.), from pere- "re-" (from Old Russian pere- "around, again," from Proto-Slavic *per-, from PIE *per- (1) "forward, through;" see per) + stroika "building, construction," from Old Russian stroji "order," from PIE *stroi-, from root *stere- "to spread" (see structure (n.)). First proposed at the 26th Party Congress (1981); popularized in English 1985 during Mikhail Gorbachev's leadership of the U.S.S.R.