The Historical Theory of Comparative Law focuses on the historical evolution of legal systems and the influence of historical factors on their development.

The Functionalist Theory emphasizes the practical application of comparative law in solving legal problems and improving legal systems.

The Sociological Theory of Comparative Law examines the relationship between law and society, and the influence of social factors on the development and functioning of legal systems.

The Realist Theory emphasizes the importance of studying the actual functioning of legal systems, rather than just their formal rules and structures.

The General Theory of Law aims to identify universal principles of law that transcend individual legal systems and cultures.

The Comparative Law and Economics approach seeks to understand the relationship between law and economics, and to analyze the economic effects of legal rules and institutions.

The Transplantation Theory focuses on the transfer of legal rules, institutions, and concepts from one legal system to another, and the challenges and consequences of such legal transplants.

The Postmodern Theory of Comparative Law critiques traditional approaches to comparative law and emphasizes the need to deconstruct and challenge existing notions of law and legal systems.

The Cultural Theory of Comparative Law focuses on the role of culture in shaping legal systems and the importance of understanding the cultural context in which laws operate.

The Comparative Constitutional Law approach seeks to compare and analyze the constitutional systems and principles of different countries, with a focus on identifying similarities, differences, and potential areas for improvement.

The Sociological Theory of Comparative Law focuses on the relationship between law and society, and the role of law in social change and development.

The Comparative Environmental Law approach seeks to compare and analyze the environmental laws, regulations, and policies of different countries, with a focus on identifying similarities, differences, and potential areas for improvement.

The Economic Analysis of Law approach applies economic principles and theories to the study of law, with a focus on analyzing the economic consequences of legal rules and institutions.

The Comparative Human Rights Law approach seeks to compare and analyze the human rights laws, standards, and practices of different countries, with a focus on identifying similarities, differences, and potential areas for improvement.

The Conflict of Laws approach focuses on the rules and principles that govern the resolution of legal disputes involving elements of more than one legal system.