How does the setting drive the plot of anthem

An unidentified city lot of the first half of Anthem is narrated from a tunnel underground where Equality 7-2521 is hiding, and the second half is narrated from a forest where he has taken refuge from a society that hates him.

Explanation:

It takes place at some unspecified future date when mankind has entered another dark age characterized by irrationality, collectivism, and socialistic thinking and economics.

Ayn Rand's dystopian novella Anthem is set in a primitive Dark Age in which scientific knowledge and technological progress are nonexistent — a repressive, regimented society, in which every aspect of life is controlled by totalitarian leaders.

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                          - jayden

a question like this requires the excerpt to be included in order to answer the question.