The author examines the evolutionary development of ideas about the casual interpretation of legal norms. The subject of the study is the legal understanding of casual interpretation in the process of formation of state and legal institutions. The object of the research is scientific publications, monographs, textbooks, treatises and other historical sources containing conceptual information on hermeneutics, legal interpretation and, in particular, on the casual interpretation of legal norms. The purpose of the research is to reveal the paradigms of the emergence and causes of the transformation of views on the casual interpretation of the legal text. The coverage of the present issue determines the initial appeal to the origins of the formation of the hermeneutical methodology itself. The author focuses on such aspects of the subject as the initial object of hermeneutics; its main historical variations; the close connection between the emergence of hermeneutical ideas with the gradual transformation of society and its forms of organization; the problem of establishing criteria for the implementation of true interpretation. The methodological basis of the work consists in the application of a historical, logical, comparative and systematic approach. The result of the research is expressed in the establishment of dominant events that are significant for the formation of the concept of the casual interpretation of legal norms at various stages of the historical development of society. The novelty of the research is predetermined by an innovative view of the formation of the hermeneutics in the context of the development of legal casuistry and legal understanding of individual life situations. The author notes that the emergence of hermeneutical methodology most vividly correlates with the desire of the subject of law to use various interpretations of emerging incidents, including legal ones. The improvement of methods of interpretation of dreams, predictions, signs, and subsequently words and text led to the emergence and doctrinal formulation of the concept of casual interpretation of normative prescriptions. In conclusion, the author summarizes that today there is a similar general theoretical understanding of the casual interpretation of the norms of law as an independent type of interpretation.