The Corrupt Bargain from the year 1824 was about how none of the candidates were able to secure a majority of the electoral vote, because of this problem they had to put this in the hands of the House of Representatives who elected John Quincy Adams instead of Andrew Jackson.
Christopher Columbus and his Motivations. Christopher Columbus went exploring and sailed off to hunt for Asia. The reason Columbus had sailed off for Asia was because: ... He was motivated by the spices and that was an example of one of the three G's [God, Glory and Gold].
The spread of Communism in China and the Soviet Union successfully testing a nuclear bomb.
Increased bargain power of workers to achieve the reduction of unfair wage payments