Friedrich Wilhelm Nietzsche was a German philosopher, poet, composer, cultural critic, and classical philologist. He wrote critical texts on religion, morality, contemporary culture, philosophy, and science, displaying a fondness for metaphor, irony, and aphorism.
Nietzsche's key ideas include the "death of God," the Übermensch, the eternal recurrence, the Apollonian and Dionysian dichotomy, perspectivism, and the will to power. Central to his philosophy is the idea of "life-affirmation", which involves questioning of all doctrines that drain life's expansive energies, however socially prevalent those views might be. His influence remains substantial within philosophy, notably in existentialism, post-modernism, and post-structuralism, as well as outside it. His radical questioning of the value and objectivity of truth has been the focus of extensive commentary, especially in the continental tradition.
Nietzsche began his career as a classical philologist before turning to philosophy. In 1869, at the age of twenty-four he was appointed to the Chair of Classical Philology at the University of Basel, but resigned in the summer of 1879 due to health problems that plagued him most of his life. In 1889, at the age of forty-four, he suffered a collapse and a complete loss of his mental faculties. The breakdown had been ascribed to atypical general paresis attributed to tertiary syphilis, but this diagnosis has since come into question. He lived his remaining years in the care of his mother until her death in 1897, then under the care of his sister until his death in 1900.
