Answer:
1990s
Explanation:
The lack of democracy, economic backwardness and crisis in the Soviet republics eventually accelerated the crisis of socialism/communism in the late 1980s. In 1989 the Berlin Wall fell and the two Germanies were reunified.
In the early 1990s, then-President of the Soviet Union, Gorbachev, began to accelerate the end of socialism with economic reforms, agreements with the US and political changes.
