The document provides an overview of the concept of human dignity in Western thought from ancient philosophers like Socrates, Plato, and Aristotle to modern traditions. It discusses how dignity emerged from the idea that humans are rational beings and have worth that separates them from animals. Stoics like Cicero and Marcus Aurelius emphasized that all humans belong to a single moral community as world citizens. The Christian tradition established the idea that humans are created in God's image, giving them inherent worth. Modern frameworks like the UN Declaration of Human Rights are founded on respecting the dignity and equal rights of all people. However, some scholars like Ruth Macklin have critiqued the vague use of "dignity" in bioethics