What is the theme in The Last Tycoon by F. Scott Fitzgerald?

Jealousy is a theme of The Last Tycoon. Jealousy is a facet of all three of the main plot lines, beginning with Cecilia's love of Stahr. Cecilia never expresses her jealousy, however she makes it very clear from the beginning of the novel that she is in love with Stahr and it is only human for her to feel jealousy when she learns that Stahr is in love with another woman. After Kathleen marries her American lover, Stahr begins spending time with Cecilia, giving her hope that perhaps now their relationship will finally move to the higher level she has been wishing for since she was a child. However, it becomes clear to Cecilia that this will not happen through rumors around the studio and from Stahr himself. As a result, Cecilia tells her father of Stahr's other lover, supposedly by mistake.