The "iron curtain" Winston Churchill referred to

The iron curtain was a metaphorical separation between the West, and Russia.

Explanation:

Following WW2, the Western powers and Russia had differences in ideology pertaining to the economic system to be used for development. Russia favored communism, while the western powers favored capitalism. Winston Churchill used the term "iron-curtain" to allude to the separation between ideologies in the European hemisphere. It wasn't until the development of the Berlin wall that there was a non-metaphorical/physical separation between the ideologies.

- "a new era of american politics began with jackson's election in 1828, but it also completed a grand social experiment begun by the american revolution. nevertheless, jacksonian democracy represented a provocative blending of the best and worst qualities of american society."

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