The Great Gatsby is set among wealthy, educated people, who have lots of leisure time and little concern about people who are not in their social milieu. Nobody’s concerned about politics or spiritual matters but everybody cares about how they are perceived socially. Those who do come from other classes seek and envy the glamour and lifestyle that they see in the elite. Jay Gatsby, the protagonist, is able to attain a certain amount of wealth, but he cannot fake education or social behaviors that only come with "old money." The novel’s two main locales, West Egg and East Egg, are distinguished also by class. East Egg represents "old money" while West Egg represents the nouveau riche. East Eggers consistently look down on West Eggers for precisely this fact. Class and wealth are virtually indistinguishable from each other, but if a person lacks education, then he is clearly not part of the upper echelon.
In The Great Gatsby, the only element not restricted to one class is unhappiness. All members of all classes have this in common.
In The Great Gatsby, social norms and expectations lead to insurmountable barriers for relationships between men and women of different classes. The inter-class relationship is ultimately impossible in this text.