From its roots in the 19th century to its full flowering in the 20th, existentialism has made a profound impression on the course of modern history. This powerful three-part series profiles the lives and critically examines the contributions of proto-existentialist Friedrich Nietzsche; Martin Heidegger; and Jean-Paul Sartre, under whom it ripened to its fullest expression. 3-part series, 50 minutes each.