  Existentialism owes its name to its emphasis on “existence”. For all the thinkers mentioned above, regardless of their differences, existence indicates the special way in which human beings are in the world, in contrast with other beings. For the existentialists, the human being is “more” than what it is: not only does the human being know that it is but, on the basis of this fundamental knowledge, this being can choose how it will “use” its own being, and thus how it will relate to the world. “Existence” is thus closely related to freedom in the sense of an active engagement in the world. This metaphysical theory regarding human freedom leads into a distinct approach to ontology, i.e., the study of the different ways of being.