How does the plot, characters, and conflict work together in Tender is the Night?

The development of the plot, characters, and conflicts is central to every good piece of literature. Examine how these elements reveal patterns in the novel.  For example, if a character doesn’t develop, how does that affect the plot/conflict—in other words, how are they related to each other? This is not a simple plot summary, but rather an analysis of how the plot, characters, and conflicts work together.