Answer:
the policies of glasnost and perestroika
Explanation:
During the 80's the soviet economy was in deep trouble as it had not adapted to the changes and new challenges presented over the years. In 1985 Mikhail Gorbachov became the head of the Communist Party and realized some changes needed to be done. He launched the Perestroika which were a series if political and economicl reforms to help the Soviet Union's economy. As a second support for the change the Glasnost was created, it referred to their policy of open discussion of political and social issues. All these lead to the collapse and democratization of the Soviet Union as they realized that their old methods were not sustainable anymore and critical changes needed to be done.
