Mikhail Gorbachev and following the Chernobyl disaster of 1986 pursued this agenda. Gorbachev's policies of "glasnost" ("openness") and "perestroika" ("restructuring") and his reorientation of Soviet strategic aims contributed to the end of the Cold War. Under this program, the role of the Communist Party in governing the state was removed from the constitution, which inadvertently led to crisis-level political instability with a surge of regional nationalist and anti-communist activism culminating in the dissolution of the Soviet Union. Gorbachev later expressed regret for his failure to save the Soviet state, though he has insisted that his policies were not failures but rather were
Communist Party of the Soviet Union became leading officials under Gorbachev. Andropov supported increased openness in the press, particularly regarding the challenges facing the Soviet Union. Andropov was in office briefly, but he appointed a number of reformers, including Yegor Ligachev, Nikolay Ryzhkov and Mikhail Gorbachev, to important positions. He also supported a crackdown on absenteeism and corruption. Andropov had intended to let Gorbachev succeed him in office, but Konstantin Chernenko and his supporters suppressed the paragraph in the letter which called for Gorbachev's elevation. Andropov died on 9 February 1984 and was succeeded by Chernenko. Throughout his short leadership, Chernenko was unable to consolidate power