Why devote an issue of an ethics journal to prison medicine? Why conduct ethics research in prisons in the first place? In this editorial, we explain why prison ethics research is vitally important and illustrate our argument by introducing and briefly discussing the fascinating papers in this special issue of the Journal of Bioethical Inquiry.Ethics is often regarded as a theoretical discipline. This is in large part due to ethics’ origin as a type of moral philosophy, which is frequently associated (...) with armchair theorising about principles and virtues and seems to have little connection with the “real world.” However, medical ethics and bioethics are increasingly becoming empirical disciplines. The “empirical turn” in ethics has led to an explosion in field research in ethics that uses the empirical methods of sociology, anthropology, and the health sciences to investigate a variety of ethical issues. The results of such research are often of much more value than purely theoret. (shrink)