Direct & Simple:
* Conflict and Illusion in The Great Gatsby
* The Nature of Conflict in Fitzgerald's The Great Gatsby
* The Great Gatsby: A Novel of Lost Dreams and Unresolved Conflict
Focusing on Specific Conflicts:
* The Clash of Class and Morality in The Great Gatsby
* The Unattainable Dream: Gatsby's Internal Conflict
* Love and Loss: The Tragedy of Conflict in The Great Gatsby
* The Green Light of Desire: Conflict and the American Dream
More Creative & Evocative:
* Gatsby's Ashes: The Price of Conflict
* The Valley of Ashes: A Landscape of Unresolved Conflict
* Beyond the Green Light: Navigating Conflict in The Great Gatsby
* The Illusion of Paradise: Conflict and the American Dream in The Great Gatsby
Tip: The best title will depend on the specific angle your essay takes. Consider what aspect of conflict you want to highlight and tailor your title accordingly.