This paper discusses the development of self-consciousness in the history of philosophy of the 20th century compared with the same development in the natural sciences. The author characterizes this stage of philosophical historiography as the “revolution of relativity.” This movement of self-consciousness was apparent in not only the humanities but also the natural sciences at the turn of the 19th and 20th centuries. Awareness of probability is a fundamental achievement of non-classic physics, which has since reversed its paradigm. In contrast (...) to the Newtonian scheme, quantum theory introduces the category of probability and insists that we can talk about certain physical phenomena only in a probabilistic mode and that the method of observation affects the phenomena observed. Consequently, any “object-subject” and “subject-subject” interaction involves the experience of the researcher, which thereby affects the results. The same model of interpretation lies at the basis of the turn toward self-consciousness in the history of philosophy of the 20th century. The classical history of philosophy is built on idealization and gives an objective description of the philosophical process. Following the other sciences, the philosophy of the 20th century understood that historical and philosophical reality largely depends on the historians of philosophy; that such reality is constructed by certain means; that there is a certain kind of historical and philosophical work; and that, with different strategies, methods and approaches, we obtain different results that are complementary to each other. The 20th century was a time of competing interpretations rather than gradually progressing historical and philosophical systems. This stimulated the search for own ideal of objectivity. For philosophical historiography, this is the hermeneutic ideal of the structural analysis of text or architectonic reconstruction. The historicalphilosophical revolution of relativity promotes the development of critical historiography and revises the foundations of its classical tradition. (shrink)