In Out of the Silent Planet, Dr. Weston is a cruel and manipulative man who aims to conquer through imperialism and intellect. With arrogance and delusions of grandeur, he finds nothing wrong with the continuation of the human race being put above everything else.
As the novel progresses, Dr. Weston kills several natives of the new planet that he explores. He does so out of indifference and arrogance, but he primarily does so out of fear. Weston fears the creatures themselves but the unknown even more. He does not understand the creatures, their culture, their language, or anything about their planet. Being a man of great intelligence and understanding, he greatly fears what he is incapable of understanding. Through this fear, he kills many of the planet's inhabitants.
Weston also fears the extinction of the human race. While his own death is inevitable, Weston hopes to colonize the new planet in order to continue the human race indefinitely. While the natives of the planet are not human, they are certainly as intelligent as humans, if not more so. However, Weston is unable to accept this fact, perhaps fearing inferiority, and expresses the belief that humans have the inherent right to conquer the planet and persevere into the future.