This dissertation is an historical and philosophical study on the development of a subjective concept of individual rights. It takes the form of a history of ideas informed by genealogical methods of inquiry. Rather than seeking an origin for and underlying truth to human rights, it treats human rights as a product of various historical developments which are capable of being investigated in terms of their contingency as well as their continuous traditions. The thesis begins with an analysis of political theory in ancient Greek thought, primarily as a means of suggesting possible alternative political philosophies to the rights-based approach dominant in modern Western societies. The thesis then considers the theologicalpolitical discourse on sovereignty in the early Middle Ages, revolving around the doctrine of divine right and influenced by the function of the Christian Church in defining the nature of government. This is followed by an examination of the emergence of hierarchical, feudal relations and the formulation of feudal rights as based on proprietary notions and coinciding with individual liberties. In the following chapter there is a discussion of the juridical construction of sovereign power that emerged from the reception of Roman law and the development of canon law, the influence of legal textuality on the granting of rights and liberties, and the emergence of a discourse on public right as a way of defining the relationship between the prince and his subjects and thus delimiting sovereign authority. Finally, the thesis considers the legacy of the theory of natural rights and its relationship to forms of liberty, with an analysis of: firstly, the idea of natural rights that developed through canon law and the discussions surrounding the Franciscan poverty disputes; secondly, the role of property rights in the formulation of the rights of liberty; thirdly, the Christian understanding of liberty as a subjective attribute or power through the theo-ontological theory of human nature as represented by the free will; and fourthly, the transformation in Renaissance and early modern legal and political theory of the concept of liberty into a political doctrine about individual autonomy and inherent freedom. The purpose of the dissertation is to describe the multiple and complex historical processes from which the idea of subjective rights has emerged, as a means of understanding how human rights have come to play a seemingly essential role in modern legal and political discourses and practices.