The philosophy of existentialism is a 20th century movement, which emphasizes the active participation of will, rather than reason, in confronting the problems of a non - moral or absurd universe. The term existentialism is applied to philosophical doctrines enunciated by Kierkegaard, Heidegger and Sartre which is centred upon the analysis of human beings that regard human existence as not exhaustively describable or understandable in idealistic or scientific terms. Existentialism is marked by its emphasis on the concreteness, subjectivity and individuality of human existence. The existential enquiry is the one in which the thinker is himself seriously involved for the nature of his own existence the search for human freedom is c...