Two developments dominated the decade that followed: the increasingly apparent crumbling of the Soviet Union's economic and political structures, and the patchwork attempts at reforms to reverse that process. Kenneth S. Deffeyes argued in Beyond Oil that the Reagan administration encouraged Saudi Arabia to lower the price of oil to the point where the Soviets could not make a profit selling their oil, so that the USSR's hard currency reserves became depleted.
Brezhnev's next two successors, transitional figures with deep roots in his tradition, did not last long. Yuri Andropov was 68 years old and Konstantin Chernenko 72 when they assumed power; both died in less than two years. In an attempt to avoid a third short-lived leader, in 1985, the Soviets turned to the next generation and selected Mikhail Gorbachev.
Gorbachev made significant changes in the economy and party leadership, called perestroika. His policy of glasnost freed public access to information after decades of heavy government censorship.
Gorbachev also moved to end the Cold War. In 1988, the Soviet Union abandoned its nine-year war in Afghanistan and began to withdraw its forces. In the late 1980s, he refused military support to the Soviet Union's former satellite states[clarify], which paved the way for Revolutions of 1989. With the tearing down of the Berlin Wall and with East Germany and West Germany pursuing unification, the Iron Curtain came down.