Answer:
The balance shifted in many ways both economic and political.
Before the war, Germany, Russia, and Austria had their empires. After the war Austria-Hungary was ended, Germany lost territory and was no longer a world power and was ruined, and Russia stopped being an Empire and became USSR. There was a new nation called Yugoslavia and many people in Europe started to get influenced by communism. France emerged as a proud victor from the war and along with Britain was the dominant force in Europe.
By putting in the pipe line
Invasions by Barbarian tribes
Economic troubles and overreliance on slave labor
