What you write for your thesis statement depends on the evidence you use. There are many different thesis statements you could come up with about what makes Gatsby great. For example, Nick writes at the beginning of the book that "there was something gorgeous about him, some heightened sensitivity to the promises of life" (2). Nick finds Gatsby to be the ultimate romantic, as Gatsby believes in the power of love. Gatsby believes that if he is accepted by Daisy and her class, he will be perennially happy. Nick says at the end of the novel, "Gatsby believed in the green light, the orgiastic future that year by year recedes before us" (180). If you choose to write about this aspect of Gatsby, your thesis statement might be something like "Gatsby's greatness stems from his unending hope in a better future." If you choose this thesis, your task is to show why Gatsby's hope is so special and how it distinguishes him from other characters, such as Daisy and Tom.