Opposition movements refer to organized efforts aimed at challenging and resisting governmental authority or political systems, often in the context of authoritarian regimes. These movements emerged prominently in Eastern Europe during the late 1980s as a response to oppressive policies, economic hardship, and the desire for democratic reforms. Their collective actions were instrumental in the wave of revolutions that swept through the region in 1989, leading to significant political changes and the eventual collapse of communist rule in several countries.
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