These are the themes :
Society and Class
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.
Love
The Great Gatsby does not offer a definition of love, or a contrast between love and romance.
Visions of America
America in The Great Gatsby is presented mostly through the scope of class: the rich, the poor, and everyone in between are identified by how much money they have.
Wealth
In The Great Gatsby, wealth can be distinguished from class; it is possible to achieve great wealth without being accepted into the elite class, as evidenced by Jay Gatsby’s experience.
Memory and The Past
The Great Gatsby deals at great length with issues of the past, present, and future.
Dissatisfaction
The Great Gatsby presents an array of characters dissatisfied with life.
Isolation
Isolation in The Great Gatsby is not the same as being alone.
Mortality
The Great Gatsby culminates in death; one accidental death, one murder, and one suicide.
Marriage
The Great Gatsby questions marriage as representative of love and loyalty.
Gender
The Great Gatsby gives us a glimpse into the gender roles of post-WWI America.
Education
In The Great Gatsby, education is a must-have for the socially elite.
Lies and Deceit
Deception is a nearly universal trait in The Great Gatsby. While our narrator claims that he is "one of the few honest people" he has ever known, we come to doubt even his integrity.
Compassion and Forgiveness
The characters in The Great Gatsby all show a unique combination of a willingness to forgive and a stubbornness not to.
Religion
The fact that religion is absent among the upper echelons of society suggests that a moral standard might also be absent.