This innovative book examines the nature of the rule of law in a free and democratic society. Eleftheria Papadaki introduces the concept of democratic legality and explores why it is important to distinguish the rule of law in a democracy from the rule of law in authoritarian regimes. Drawing on predominant theories of legality from Aristotle and Plato to John Rawls and Ronald Dworkin, Papadaki engages with classic debates, including the content of democratic governance and the relationship between law and morality. She argues that substantive pluralism, the foundational element of democratic legality, underlies the entire legal system from private to public law and political theory. The book explores this concept within diverse areas of law, including negligence and affirmative action, while analyzing the potential for artificial intelligence to empower democratic legality in the future. Democratic Legality is a valuable resource for scholars and students of legal philosophy, legal and political theory, and law and technology. It is also highly beneficial to policy-makers and law-makers seeking to understand how democratic legality contributes to the principles of freedom and equal citizenship.