This book offers a systematic analysis of the moral principles that should apply to biomedicine. We understand "biomedical ethics" as one type of applied ethics. In our discussions of ethical theory per se, we offer anaylses of levels of moral deliberation and justification and of the ways two major approaches interpret principles, rules, and judgments. The systematic core of the book presents four fundamental moral principles--autonomy, beneficence, nonmaleficence, and justice.