Answer:
>1877: The Great Strike
>1886: The Haymarket Affair
>1892: The Steel Strike
>1911: Triangle Fire
I worked the problem out to show you
The politics of America has changed widely from 1854 today while in 1854 there for two parties the Whigs and the Democratic. The democratic were in favor of slavery while the Whigs differed in this case. Because of which it collapse to form a new party called the Republican. Abraham Lincoln was the first President of this party and was successful in establishment of slavery.
After Lincoln's death Republican Party still went on to see if the slaves got their rights. with time it Businessman and wealthy people got more involved with party for power. Hence by 1920 this party becomes more of business party Until the economic crash in 1929 After which Franklin Roosevelt and other democrats come into power.
From 1989 to 2011 there was a very great Hispanic immigration taking place and democrats supported realizing these immigrants throughout. And today Republican formed trust in the resentment of this. this is how from ancient politics modern politics got connected .
The Monroe Doctrine simply stated that the west will not interfere with the affairs of Europe as long as they didn't interfere with us. This enabled us to be able to deal with the smaller countries and help them reform their government. The Monroe doctrine allowed the United States to become "protectors" of the smaller countries in the western hemisphere.