* The Struggle Against Nature: The story portrays the brutal reality of the relationship between humans and the wild, where nature is a powerful force to be tamed and controlled. This theme is reflected in the protagonist's attempts to subdue the wild horse, representing the human desire to dominate nature.
* Human Nature and Its Dark Side: The story depicts the protagonist's psychological transformation as he becomes consumed by the task of breaking the horse. He exhibits cruelty and brutality, revealing the potential for darkness within human nature when faced with the need to exert control.
* The Consequences of Our Actions: The protagonist's methods of breaking the horse are harsh and ultimately lead to the horse's death. This serves as a stark reminder of the consequences of our actions, particularly when we prioritize control over compassion.
* The Cycle of Violence: The story suggests a cycle of violence, where the act of breaking the horse mirrors the larger societal structures and power dynamics that perpetuate violence. This highlights the systemic nature of oppression and the need for more humane ways of interacting with both nature and other humans.
These themes are not explicitly stated in the short story, but they are present in the underlying narrative and the actions of the protagonist. "Horse Breaker" serves as a powerful microcosm of the larger themes explored in the novel "The Horse Thief."