Throughout the history of the Soviet Union tens of millions of people became victims of political repression, which was an instrument of the state since the October Revolution. Culminating during the Stalin era, it still existed during the "Khrushchev Thaw", followed by increased persecution of Soviet dissidents during the Brezhnev stagnation, and didn't cease to exist during Mikhail Gorbachev's perestroika. Its heritage still influences the life of modern Russia and other former Soviet states.