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
History of the Communist Party of the Soviet Union and rather than being a locus for change became a bulwark of conservatism. Increasingly, Gorbachev bypassed the party in order to implement his reforms relying instead on governmental bodies. In 1989 Gorbachev allowed other political associations (de facto political parties) to coexist with the Communist Party and in 1990 obtained the repeal of Article Six of the USSR constitution which gave the party supremacy over all institutions in society, thus ending its vanguard status. The Communist Party's power over the state formally ended that same year with the newly created post of President of the Soviet Union. Gorbachev was elected