The Soviet Union - they were the cause and driving force behind Communism in Eastern Europe from the 1920/30s into the 80s. Without their military power and influence, communism in Eastern Europe fell away.
The correct answer is de jure segregation. De jure segregation refers to the legal separation of different types of people, which is allowed by the law. Its other opposite is the de facto segregation, wherein people are not forced by the law to be separate from different types of people, yet the people still choose to be separated from one another.
Martin luther king
Abraham Lincoln
George washington
Albert einstein
