Peter Wessel Zapffe (18 December 1899 – 12 October 1990) was a Norwegian philosopher, author, artist, lawyer and mountaineer. He is often noted for his philosophically pessimistic and fatalistic view of human existence. His system of philosophy was inspired by the German philosopher Arthur Schopenhauer, as well as his firm advocacy of antinatalism. His thoughts regarding the error of human life are presented in the essay "The Last Messiah" ("Den sidste Messias", 1933). This essay is a shorter version of his best-known and untranslated work, the philosophical treatise On the Tragic (Om det tragiske, 1941).