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,
History of the Soviet Union (1982–91) were in agreement that nuclear war could not be won by either side and must never be allowed to happen. It was also agreed that Reagan and Gorbachev would carry out two more summit meetings in 1986–87. Jimmy Carter had officially ended the policy of détente, by financially aiding the Mujahideen movement in neighboring Socialist Afghanistan, which served as a pretext for the Soviet intervention in Afghanistan six months later, with the aims of supporting the Afghan government, controlled by the People's Democratic Party of Afghanistan. Tensions between the superpowers increased during this time, when Carter placed trade embargoes on