in existential psychology, a person’s worldview or fundamental orientation toward life: his or her essential mode of being-in-the-world. The term and concept come from the work of Swiss existential psychologist Ludwig Binswanger (1881–1966). A person’s world design includes the way in which that person integrates the totality of his or her personality with the world as he or she experiences it. In this approach, understanding a person’s world design is essential in understanding the person.