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
Foreign relations of the Soviet Union power struggles and foreign intervention, requested the neighboring Soviet Union to send military aid. Soviet intervention was seen as a hostile invasion by the United States and its allies, who funded the counter-revolutionary Mujahadeen, and thus led to a return to hostilities which were greatly exacerbated in the following years. When Mikhail Gorbachev became the leader of the Soviet Union in 1985, he sought to restructure the Soviet Union to resemble the Scandinavian model of western social democracy and thus create a private sector economy. He removed Soviet troops from Afghanistan and began a hands-off approach in the USSR's relations