The Congress of People's Deputies was the highest legislative body in the Soviet Union from 1989 to 1991, representing a significant shift in the political structure as part of Mikhail Gorbachev's reforms. It aimed to create a more democratic framework by allowing for direct elections of deputies and promoting glasnost, or openness, within the political system. This body played a crucial role in the implementation and impact of perestroika, as it sought to address the economic and social challenges facing the Soviet Union during its transitional period.