In this excerpt, Justice Harlan is warning against

allowing powerful monopolies to dominate interstate commerce

Explanation:

All who recall the condition of the country in 1890 will remember, the country was in real danger from another kind of slavery.

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explanation:

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.