Ronald Reagan explained his strategy was an arms buildup that would leave the Soviets far behind, with no choice but to negotiate arms reduction. Finally, displaying his characteristic optimism, he praised liberal democracy and promised that such a system eventually would triumph over Soviet communism. Reagan appreciated the revolutionary change in the direction of the Soviet policy with Mikhail Gorbachev, and shifted to diplomacy, with a view to encourage the Soviet leader to pursue substantial arms agreements. He and Gorbachev held four summit conferences between 1985 and 1988: the first in Geneva, Switzerland, the second in Reykjavík, Iceland, the third in Washington,
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