What are the fundamental criteria that determine whether an entity possesses moral status and warrants moral consideration? Mary Anne Warren, a philosopher noted for her work in ethics, examines the complex boundaries of moral standing. She argues against the reliance on a single property, such as sentience or rationality, and instead proposes a multi-faceted framework consisting of seven basic principles to evaluate the moral status of various entities.

Experts and scholars in the field of bioethics frequently cite this work as a foundational text for understanding the complexities of moral status. Readers often note the clarity of the author's arguments, which provide a structured approach to navigating highly contentious ethical debates.