Why they name it progressive era? if they can just say the great depression because they are mostily talking about how people where depressed and fighting for constitutional rights.?

the exclusive possession or control of the supply or trade in a commodity or service.

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.