Title: Six existentialist thinkers
Subjects: Existentialism, Modern Philosophers, Philosophers, Modern
People: Friedrich Wilhelm Nietzsche (1844-1900), Gabriel Marcel (1889-1973), Jean-Paul Sartre (1905-1980), Karl Jaspers (1883-1969), Martin Heidegger (1889-1976), Søren Kierkegaard (1813-1855)