Standard bioethics textbooks present the field to students and non-experts as a form of “applied ethics.” This ahistoric and rationalistic presentation is similar to that used in philosophy of science textbooks until three decades ago. Thomas Kuhn famously critiqued this self-conception of the philosophy of science, persuading the field that it would become deeper, richer, and more philosophical, if it integrated the history of science, especially the history of scientific change, into its self-conception. This essay urges a similar reconceptualization for bioethics, arguing that the analysis of moral change ought to be integral to bioethics (and to ethics generally). It proceeds by suggesting the sterility of the ahistoric, rationalist applied ethics model of bioethics embraced by standard bioethics textbooks. It also suggests the fecundity of alternative conceptions of the bioethics that focus on the history of successful and failed attempts to negotiate moral change, and the history of multifaceted relations between moral philosophy and practical ethics.