United States
In 1974, Richard Nixon became the first President to resign. This was because of the Watergate scandal, where people broke into the Democratic headquarters and took a lot of information to help Nixon. During the Yom Kippur War, the United States helped Israel. Because of this, countries in OPEC did not let the United States buy their oil. This started an oil crisis. In the 1970s, the country's economy had a problem with stagflation, something that happens when prices go up but production does not. When Ronald Reagan was elected in 1980, he tried to stop this with lower taxes and less government control over the economy. These changes were called Reaganomics. The Cold War ended in 1991. This was because the Soviet Union dissolved. With no Soviet Union, the United States became the largest superpower in the world.