What does the term manifest destiny imply?

"Manifest destiny was a term that came to describe a widespread belief in the middle of the 19th century that the United States had a special mission to expand westward.

to reform the distraught soviet union, the democratization of the communist party was promoted through party secretary mikhail gorbachev's policies of “perestroika” and “glasnost.” perestroika refers to the reconstruction of the political and economic system established by the communist party.