This title explores the foundational theoretical aspects of international human rights law, delving into the philosophical underpinnings and conceptual frameworks that shape our understanding of human rights. It examines the historical evolution of human rights ideas, the influence of various philosophical traditions, and the ongoing debates about the nature and universality of human rights. This section also addresses the epistemological ruptures between philosophy and law, and between law and justice, highlighting the challenges in reconciling these perspectives within a coherent human rights framework. It discusses the contributions of different schools of thought, such as natural law, positivism, and sociological approaches, to the development of human rights theory. By critically analyzing these theoretical foundations, this title aims to provide a deeper understanding of the principles and values that underpin international human rights law and to highlight the complexities and nuances involved in defining and protecting human rights in diverse cultural and legal contexts.