Mikhail Gorbachev major campaign to limit alcohol consumption, which Gorbachev—who believed it would improve health and work efficiency—oversaw. His wife keenly supported the measure. As a result, crime rates fell and life expectancy grew slightly between 1986 and 1987. The reform had significant costs to the Soviet economy, resulting in losses of up to $100 billion between 1985 and 1990. Gorbachev later considered the campaign to have been an error. In April 1986 the Chernobyl disaster occurred; in the immediate aftermath, officials fed Gorbachev incorrect information to downplay the incident. As the scale of the disaster became apparent, 336,000 people were evacuated
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