The document discusses the author's ethical theory based on virtue ethics. The author believes virtue ethics is the best approach because it emphasizes one's character as key to ethical thinking. The author analyzes three principles - eudaimonism, ethics of care, and agent-based theories - to explain how we can determine what makes an action moral or immoral. Eudaimonism focuses on virtues and well-being. Ethics of care values marginalized groups' contributions. Agent-based theories consider character traits and judgments of the agent's intentions.