The article discusses how Western legal thinking is influenced by the concept of law as a self-value or natural law. It shows that a multidisciplinary approach to law can help avoid common legal thinking pitfalls. The development of Western legal philosophy has incorporated various disciplines like ethics, history, sociology, and psychology. The importance of multidisciplinarity is demonstrated through research on the formality of Roman law, which considered legal phenomena from a historical and religious perspective. The article outlines the structure of multidisciplinary legal research, including elements from human ethology to conceptual considerations.