The fall of communism, the rise in democracy and the splitting of some countries into new countries as a result of a rise in nationalism.
Communism collapsed.
Christianity
Christianity
It led to independence for many countries.
religious movement swept through europe and the colonies in the mid 1700s
the black plague in the early 1900s
West
World War One.
world war 1
I am not completely shure but I would guess the Huns,
Black Death
Black Death Plague swept death. In Europe at 1346 to 1353.
There were no nurses during the periods when the plague swept across Europe.