This article analyzes the relationship between Being and humanity in Martin Heidegger's "Letter on Humanism." It explores the philosophical foundations of his critique of traditional humanism, the specific understanding of human essence, and the role of language as a space for the revelation of Being. It demonstrates that humanity is viewed not as the center of existence, but as one called to preserve the truth of Being. Hermeneutic and comparative philosophical methods are employed. The results demonstrate the relevance of Heidegger's ideas for contemporary understanding of human identity and spiritual values ​​in the context of global transformations. Keywords: Being, humanity, humanism, language, existence, Heidegger, philosophical anthropology.

Existentialism, which has had its influence in the history of world philosophy and the development of human thought, especially the French existential philosophy, has a philosophical analysis of human freedom, responsibility, free will, existence between life and death, and the essence of existence. is significant with its unique approach. In this, Jean-Paul Sartre's philosophical conceptual expression of the problem of man and his existence not only attracted the attention of intellectuals of the society who directly witnessed the socio-political crisis that occurred in his time, but is also relevant in the philosophical understanding of modern socio-political problems. The article discusses the humanitarian aspects of Jean-Paul Sartre's existential philosophy.