During the 1980s, President Ronald Reagan and Mikhail Gorbachev, leader of the Soviet Union, undertook a series of meetings and negotiations that helped lead to the end of the Cold War. These were the major events in international affairs in the 1980s that helped lead to the end of the Cold War.
What was important in Reagan and Gorbachev's interactions was the fact that they managed to get along with one another and inspire trust in one another. This rapport led, for example, to Gorbachev's willingness to ignore the Strategic Defense Initiative. When this happened, Reagan was willing to sign the INF Treaty, which led to the destruction of many nuclear weapons.
It was events like this that helped to end the Cold War. As Reagan and Gorbachev met and made deals like this one, it became easier for the two sides to stop seeing one another as enemies. This led to an easing of tensions and an eventual end to the Cold War.