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 the upper echelons of the Soviet political landscape, to implicate General Valentin Varennikov, a member of the August coup plotters, and General Vladislav Achalov, another August coup conspirator. These persons were characterised as individuals "who were prepared to remove Gorbachev from his presidential office unconstitutionally" and "were more than capable of using unauthorised violence against nationalist separatists some months earlier". Brown criticises Gorbachev for "a conscious tilt in the direction of the conservative forces he was trying to keep within an increasingly fragile coalition" who would later betray him; he also criticises Gorbachev "for his tougher line and heightened rhetoric