Thomas Aquinas is one of the foremost thinkers in Western philosophy and Christian scholarship. He is recognized as a significant voice in both theological discussions and secular philosophical debates. The past century has witnessed a revival of interest in Aquinas' thought across various schools in philosophy. Concurrently, scholars have utilized Thomism as a basis for addressing certain issues in bioethics. This volume offers a rigorous interpretation of Aquinas' metaphysics and ethical thought and illuminates its relevance to these contemporary questions in bioethics. It presents a significant philosophical viewpoint in order to motivate further dialogue among both religious and secular arenas of inquiry concerning these difficult issues of individual and public concern.