Gorbachev's rule refers to the leadership of Mikhail Gorbachev, who served as the General Secretary of the Communist Party of the Soviet Union from 1985 until 1991. His tenure is marked by significant reforms aimed at addressing the political and economic stagnation of the Soviet Union, primarily through policies like glasnost (openness) and perestroika (restructuring), which played a crucial role in the end of the Cold War and the eventual dissolution of the Soviet Union.