F. Scott Fitzgerald explored themes of the American Dream, wealth, love, and disillusionment in "The Great Gatsby." The novel critiques the idea of success through material wealth and highlights the moral decay of society during the Roaring Twenties. Fitzgerald’s use of symbols, such as the green light and the valley of ashes, emphasizes the futility of striving for unattainable ideals. Ultimately, the narrative reflects the struggle for identity and the hollowness that often accompanies the pursuit of dreams.