Gertrude Himmelfarb.
One Nation, Two Cultures.
New York: Vintage Books, 2001.

Himmelfarb begins with this quote from Adam Smith:

In every civilized society, in every society where the distinction of ranks has once been completely established, there have been always two different schemes or systems of morality current at the same time; of which the one may be called the strict or austere; the other the liberal, or, if you will, the loose system. The former is generally admired and revered by the common people; the latter is commonly more esteemed and adopted by what are called the people of fashion.

Himmelfarb describes the American Cultural Revolution of the Twentieth Century in which the liberal culture previously restricted to the upper classes and "bohemians" became widespread among the middle and lower classes (the "counterculture"). Himmelfarb details the resulting cultural divide and how it has played out in chapters devoted to: Civil Society, Family, Law and Polity, Religion, and Ethics. It appears that the American Cultural Revolution is in the process of being challenged, reversed and supressed to varying degrees by a reformation or counter-revolution which has become know in some circles as the Fourth Great Awakening.