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 politically, Gorbachev believed that the Comecon and Warsaw Pact could be reformed into more effective entities. Alexander Yakovlev, a close advisor to Gorbachev, would later state that it would have been "absurd to keep the system" in Eastern Europe. In contrast to Gorbachev, Yakovlev had come to the conclusion that the Soviet-dominated Comecon was inherently unworkable and that the Warsaw Pact had "no relevance to real life". By the end of the 1980s, severe shortages of basic food supplies (meat, sugar) led to the reintroduction of the war-time system of distribution using food cards that limited each citizen to