The article is devoted to understanding the problem of human self-determination in the modern social and cultural space, in which the question of personal identity becomes a search for one's own individualization, a question of survival and preservation of man as such. The relevance of the study is determined by the process of dehumanization of modern society, a crisis of spirituality leading to the prevalence of destructive origins, to depersonalization and the destruction of the individual personal dimension of human existence. The leading approach to the study of this problem is the method of the ascent from the abstract to the concrete, which makes it possible to comprehend the being of man and the phenomena of his existence associated with it. In this study, we used the dialectical method and the hermeneutical analysis of texts by modern scholars who consider the problems of the philosophical foundations of personal identity in the modern social and cultural world. The connection between the constitution of the essential definitiveness of the human personality and the existential source of the human origin itself is shown. The influence of the social transformation processes on the methods and possibilities of self-identification of man, on his self-identity is revealed. The conducted analysis shows that the key problem of modern society is man himself as a subject of a technotronic-oriented civilization, in which his personal identity is not only a key factor in his existence, but also a fundamental link in the reconstruction of the wholeness of being.