How did Anna Quindlen introduce what she called the “first strain of behavior” that promotes the concept of unity?

This question is incomplete, here´s the complete question.  

Read " A Quilt of a Country," by Anna Quindlen.

How did Anna Quindlen introduce what she called the “first strain of behavior” that promotes the concept of unity?

She described the Calvinist undercurrent in America

Explanation:

Quindlen explains that there are two strains of behavior that support the concept of unity in a country with diversity in its people´s national heritage. First of all, the Calvinist undercurrent in the social psyche that craves a challenge, the desire to achieve what seems impossible, even unity in a culture born out of diversity.

in   ¨and yet the books¨   by czelaw miloz the tone is positive since it tells us that when we touch a book, it starts to live and the perspective is in the third person and turns once into the first person. in "the rhinoceros" by eugene ionesco the tone is illogical and absurd   and the perspective is in the third person since it is a play.

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