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 overwhelmingly voted for independence. Ukraine had been the second most powerful republic in the Soviet Union after Russia, and its secession ended any realistic chance of the Soviet Union staying united even on a limited scale. The presidents of Russia, Ukraine and Belarus met in Belovezha Forest, near Brest, Belarus, on 8 December and signed the Belavezha Accords, which declared the Soviet Union had ceased to exist and formed the Commonwealth of Independent States as its successor. Gorbachev initially denounced this move as illegal. Nonetheless, there was no longer any doubt that the Soviet Union, in the words of the