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Perestroika was an economic policy of Mikhail Gorbachev. It was the first time that private ownership of businesses was legal in the Soviet Union.
Russia.
Restructuring of the economy and society - if in politics
Literally Re-building
Mikhail Gorbachev was the Russian president at the time of Perestroika.
The Soviet leader most associated with perestroika is Mikhail Gorbachev.