Friedrich Wilhelm Nietzsche (15 October 1844 – 25 August 1900) was a German philosopher and writer who started his career as a classical philologist and turned to philosophy early in his academic career. In 1869, at age 24, he was appointed Professor of Classical Philology at the University of Basel. Plagued by health problems for most of his life, he resigned from the university in 1879. He afterward lived as an independent writer, spending much of his life in relative solitude and financial insecurity while moving between Switzerland, Italy, and southern France in search of climates that might alleviate his condition, and in the following decade, he completed much of his core writing. In 1889, aged 44, he suffered a neurological collapse, and thereafter a complete loss of his mental faculties, with paralysis and vascular dementia; he lived out his remaining 11 years, first under the care of his mother, and later his sister, until his death. His works and his philosophy have fostered not only extensive scholarship but also much popular interest.

Nietzsche's work encompasses poetry, cultural criticism, and philosophical essays while displaying a fondness for aphorisms and irony. Prominent elements of his philosophy include his critique of objective truth in favour of perspectivism; a genealogical critique of Christian morality and a related theory of master–slave morality; the affirmation of life in response to both the weakening of religion ("God is dead") and the crisis of passive nihilism which followed it; the notion of Apollonian and Dionysian duality; and a characterisation of the human subject as the expression of competing wills, collectively understood as the will-to-power. His later work developed influential concepts such as the , the transvaluation of values, and his unique formulation of eternal return. His body of work touched a wide range of topics, including aesthetic, philology, history, music, religion, tragedy, culture and science, and drew inspiration from such diverse sources as Greek tragedy, Arthur Schopenhauer, Ralph Waldo Emerson, and Richard Wagner.

After Nietzsche's death, his sister, Elisabeth Förster-Nietzsche, became the curator and editor of his manuscripts. She edited his unpublished writings to fit her German ultranationalist ideology, often contradicting or obfuscating Nietzsche's stated opinions, which were explicitly opposed to antisemitism and nationalism. Through her published editions, Nietzsche's work became associated with fascism and Nazism. Twentieth-century scholars such as Walter Kaufmann, R. J. Hollingdale and Georges Bataille defended Nietzsche against this interpretation, and corrected editions of his writings were soon made available. His works enjoyed renewed popularity in the 1960s and his ideas have since had a widespread impact on 20th- and 21st-century thinkers across philosophy—especially in schools of continental philosophy such as existentialism, postmodernism and post-structuralism—as well as art, literature, music, poetry, politics and popular culture.

Biography Youth (1844–1868)

Born on 15 October 1844, Nietzsche grew up in the town of Röcken (now part of Lützen), near Leipzig, in the Prussian Province of Saxony. He was named after King Friedrich Wilhelm IV of Prussia, who turned 49 on the day of Nietzsche's birth (Nietzsche later dropped his middle name, Wilhelm). Nietzsche's great-grandfather, (1714–1804), was an inspector and a philosopher. Nietzsche's grandfather, (1756–1826), was a theologian. Nietzsche's parents, Carl Ludwig Nietzsche (1813–1849), a Lutheran pastor and former teacher; and (née Oehler) (1826–1897), married in 1843, the year before Friedrich's birth. They had two other children: a daughter, Elisabeth Förster-Nietzsche, born in 1846; and a second son, Ludwig Joseph, born in 1848. Nietzsche's father died of a brain disease in 1849, after a year of excruciating agony, when the boy was only four years old; Ludwig Joseph died six months later at age two. The family then moved to Naumburg, where they lived with Nietzsche's maternal grandmother and his father's two unmarried sisters. After the death of Nietzsche's grandmother in 1856, the family moved into their own house, now Nietzsche-Haus, a museum, and Nietzsche study centre.

Nietzsche attended a boys' school and then a private school, where he became friends with Gustav Krug and Wilhelm Pinder, both of whom came from highly respected families. Academic records from one of the schools attended by Nietzsche noted that he excelled in Christian theology.

In 1854 he began to attend the Gymnasium in Naumburg. Because his father had worked for the state (as a pastor), the now-fatherless Nietzsche was offered a scholarship to study at Schulpforta. That Nietzsche was admitted on the strength of his academic competence has been debunked: his grades were not near the top of the class. He studied there from 1858 to 1864, becoming friends with Paul Deussen and Carl von Gersdorff (1844–1904), who later became a jurist. He also found time to work on poems and musical compositions. Nietzsche led "Germania", a music and literature club, during his summers in Naumburg. At Schulpforta, Nietzsche received an important grounding in languages—Greek, Latin, Hebrew, and French—to be able to read important primary sources; he also experienced for the first time being away from his family life in a small-town conservative environment. His end-of-semester exams in March 1864 showed a 1 in Religion and German; a 2a in Greek and Latin; a 2b in French, History, and Physics; and a "lackluster" 3in Hebrew and Mathematics.

Nietzsche was an amateur composer. He composed several works for voice, piano, and violin beginning in 1858 at the Schulpforta in Naumburg when he started to work on musical compositions. Richard Wagner was dismissive of Nietzsche's music, allegedly mocking a birthday gift of a piano composition sent by Nietzsche in 1871 to Wagner's wife Cosima. German conductor and pianist Hans von Bülow also described another of Nietzsche's pieces as "the most undelightful and the most anti-musical draft on musical paper that I have faced in a long time".

While at Schulpforta Nietzsche pursued subjects that were considered unbecoming. He became acquainted with the work of the then-almost-unknown poet Friedrich Hölderlin, calling him "my favourite poet" and writing an essay in which he said that the poet raised consciousness to "the most sublime ideality". The teacher who corrected the essay gave it a good mark but commented that Nietzsche should concern himself in the future with healthier, more lucid, and more "German" writers. Additionally, he became acquainted with Ernst Ortlepp, an eccentric, blasphemous, and often drunken poet who was found dead in a ditch weeks after meeting Nietzsche but who may have introduced Nietzsche to the music and writing of Richard Wagner. Perhaps under Ortlepp's influence, he and a student named Richter returned to school drunk and encountered a teacher, resulting in Nietzsche's demotion from first in his class and the end of his status as a prefect.

After graduation in September 1864,His "valedictorian paper" (, graduation thesis for Pforta students) was titled "On Theognis of Megara" ("De Theognide Megarensi"); see Nietzsche began studying theology and classical philology at the University of Bonn in the hope of becoming a minister. For a short time, he and Deussen became members of the Burschenschaft (student association) Frankonia. After one semester (and to the anger of his mother), he stopped his theological studies and lost his faith. As early as his 1862 essay "Fate and History", Nietzsche argued that historical research had discredited the central teachings of Christianity, but David Strauss's Life of Jesus also seems to have had a profound effect on the young man. In addition, Ludwig Feuerbach's The Essence of Christianity influenced young Nietzsche with its argument that people created God and not the other way around. In June 1865, at the age of 20, Nietzsche wrote to his sister Elisabeth, who was deeply religious, a letter regarding his loss of faith. This letter contains the following statement: Hence the ways of men part: if you wish to strive for peace of soul and pleasure, then believe; if you wish to be a devotee of truth, then inquire....

Nietzsche subsequently concentrated on studying philology under Professor Friedrich Wilhelm Ritschl, whom he followed to the University of Leipzig in 1865. There, he became close friends with his fellow-student Erwin Rohde. Nietzsche's first philological publications appeared soon after.

In 1865 Nietzsche thoroughly studied the works of Arthur Schopenhauer. He owed the awakening of his philosophical interest to reading Schopenhauer's The World as Will and Representation, later admitting that Schopenhauer was one of the few thinkers whom he respected, dedicating the essay "Schopenhauer as Educator" in the Untimely Meditations to him.

In 1866 he read Friedrich Albert Lange's History of Materialism. Lange's descriptions of Immanuel Kant's anti-materialistic philosophy, the rise of European Materialism, Europe's increased concern with science, Charles Darwin's theory of evolution and the general rebellion against tradition and authority intrigued Nietzsche greatly. Nietzsche would ultimately argue the impossibility of an evolutionary explanation of the human aesthetic sense.

In 1867 Nietzsche signed up for one year of voluntary service with the Prussian artillery division in Naumburg. He was regarded as one of the finest riders among his fellow-recruits, and his officers predicted that he would soon reach the rank of captain. In March 1868, while mounting his horse, Nietzsche struck his chest against the pommel and tore two muscles in his left side, leaving him exhausted and unable to walk for months.Nietzsche, Friedrich. [June 1868] 1921. "Letter to Karl Von Gersdorff." Selected Letters of Friedrich Nietzsche, translated by A. M. Ludovici. Consequently, he turned his attention to his studies again, completing them in 1868. Nietzsche also met Richard Wagner for the first time later that year.Nietzsche, Friedrich. [November 1868] 1921. "Letter to Rohde." Selected Letters of Friedrich Nietzsche, translated by A. M. Ludovici.

Professor at Basel (1869–1879)

In 1869, with Ritschl's support, Nietzsche received an offer to become a professor of classical philology at the University of Basel in Switzerland. He was only 24 years old and had neither completed his doctorate nor received a teaching certificate ("habilitation"). He was awarded an honorary doctorate by Leipzig University in March 1869, again with Ritschl's support.

Despite his offer coming at a time when he was considering giving up philology for science, he accepted. To this day, Nietzsche is still among the youngest of the tenured Classics professors on record.

Nietzsche's 1870 projected doctoral thesis, "Contribution toward the Study and the Critique of the Sources of Diogenes Laertius" ("Beiträge zur Quellenkunde und Kritik des Laertius Diogenes"), examined the origins of the ideas of Diogenes Laërtius. Though never submitted, it was later published as a ('congratulatory publication') in Basel.

Before moving to Basel, Nietzsche renounced his Prussian citizenship: for the rest of his life he remained officially stateless.His, Eduard. 1941. "Friedrich Nietzsches Heimatlosigkeit." Basler Zeitschrift für Geschichte und Altertumskunde 40:159–186.

Note that some authors (incl. Deussen and Montinari) mistakenly claim that Nietzsche became a Swiss citizen to become a university professor.