post-apocalyptic science fiction novel, confronts many religious themes. I will give a brief summary of the novel and then elaborate on the theory of preference utilitarianism and the view of Peter Singer. Then, I will, explore the role of ethics in the novel in regards to preference utilitarianism, as held by the theorist Peter Singer. Finally, I will draw implications for the reader from my analysis about ethics. A Canticle for Leibowitz A Canticle for Leibowitz follows a monastic order in a post-apocalyptic