Answer
Existentialism, as the overarching philosophical strand encompassing Martin Buber's work, emphasizes the uniqueness and subjectivity of human existence. It highlights the individual's responsibility in creating their own meaning and purpose in life, often grappling with themes of freedom, choice, and the search for authenticity amidst an often-absurd world. Buber's philosophy delves into the depth of human relationships and the significance of authentic encounters, reflecting the core tenets of existentialist thought.