Possible Thesis Statements:
* The destructive power of war and its impact on familial relationships: This could be argued by focusing on how the war irrevocably changes Henry, leading to his estrangement from his brother, Lyman. The red convertible, initially symbolizing their bond, becomes a tangible representation of their growing distance.
* The enduring power of love and memory: Despite the tragic events and Henry's transformation, Lyman's love for his brother remains constant. The story emphasizes the importance of memory and the enduring nature of familial bonds even in the face of loss.
* The complexities of grief and loss: Lyman's grief over Henry's fate is a central theme, and the story explores the various ways people cope with loss. The red convertible serves as a potent symbol of this grief, representing both the beauty of the past and the painful reality of its absence.
* The importance of acceptance and forgiveness: While Lyman struggles to understand and accept Henry's changes, he ultimately finds a way to move forward, acknowledging the reality of his brother's transformation. This acceptance suggests a degree of forgiveness, highlighting the importance of letting go of anger and resentment.
Ultimately, the "thesis" of "The Red Convertible" is open to individual interpretation. The story's ambiguity allows readers to explore its themes and draw their own conclusions about the impact of war, the power of love, and the complexities of human relationships.