To what extent is American dream seen in the heart of American Pastoral?

American Pastoral illustrates a picture of the old America that spans about ten decades, from the 1890s to the 1990s. Notably, the story also briefly settles on the happenings during the Second World War, which narrows on the Vietnam War and the Watergate scandal. The story reveals that the American dream is almost like a nightmare, as the events cause the ostensible pastoral to is overtaken by realistic berserk circumstances.