Philosophy › The 19th century
Friedrich Nietzsche
1844–1900· Philosopher· Ethics & how to live
Well documentedSolid records, texts or physical evidence.
German philosopher who announced the 'death of God' and challenged Western morality, calling for new values that affirm life.
See it on the Philosophy map →The idea
The idea: as belief in God fades, the moral values built on it lose their footing, and humans must create their own. Trained as a classical scholar, he became a Basel professor at 24, then left through illness to write aphoristic books, from The Gay Science (1882) and Thus Spoke Zarathustra (1883–85) to Beyond Good and Evil (1886). Schopenhauer and Darwin shaped him; he turned against both. He collapsed mentally in 1889. Main objection: he demolishes far more than he builds.
Why it matters
He shaped existentialism, postmodernism and psychology, and his question of how to live without God remains central; his sister's distortions let the Nazis misuse him.
Legacy and sources
His books and notebooks, critically edited by Colli and Montinari from 1967, replaced the misleading 'Will to Power' compiled by his antisemitic sister Elisabeth, who also forged letters.
Still debated
The cause of his 1889 breakdown: syphilis was the old diagnosis, now doubted; brain tumor, an inherited stroke disease and bipolar illness are proposed.
Inside this (3)
Connections (5)
▸Arthur Schopenhauer inspired Friedrich NietzscheWell documented
The connection
Nietzsche, 21, found The World as Will and Representation in a Leipzig secondhand bookshop and was converted. His first book, The Birth of Tragedy (1872), builds on Schopenhauer's will and his view of music. Later he reversed the verdict: instead of denying the will, affirm life, suffering included.
When and how
Leipzig, autumn 1865; his essay 'Schopenhauer as Educator' followed in 1874, and the break showed in Human, All Too Human (1878).
How we know
Nietzsche's own account of the bookshop discovery in autobiographical notes of 1867–68, and his essay 'Schopenhauer as Educator.'
Debates and open questions
How far the 'will to power' reworks Schopenhauer's will, and whether Nietzsche escaped his pessimism or simply inverted it.
▸Darwin's theory of evolution influenced Friedrich NietzscheMostly agreed
The connection
Darwin confirmed for Nietzsche that humans are animals with no fixed essence or divine origin, so values have histories and can change. But Nietzsche rejected Darwinism's focus on survival and adaptation: life seeks power and growth, not mere self-preservation, and the weak, by numbers and cunning, often defeat the strong. He titled one section 'Anti-Darwin.'
When and how
Leipzig, Basel and his wandering years, 1866–1888; he met Darwin's ideas largely secondhand, through German works such as Friedrich Albert Lange's History of Materialism (1866).
How sure are we?
His explicit references to Darwin in The Gay Science (1882) and Twilight of the Idols (1888); letters document his reading of Lange.
Debates and open questions
Whether he ever read Darwin directly, and whether the Übermensch is biological; some scholars see heavy Darwinian influence, others mainly reaction.
▸Friedrich Nietzsche proclaimed "God is dead"Well documented
The connection
Nietzsche put the phrase in the mouth of a madman who runs into a marketplace with a lantern in broad daylight, telling unbelievers they have killed God without grasping the consequences. His point was cultural: once faith fades, the Christian morality built on it loses its foundation, and Europe faces nihilism.
When and how
The Gay Science, section 125, published in 1882, when Nietzsche, retired from his Basel professorship by ill health, was living between Switzerland and Italy.
How we know
The passage is in the published text, and he repeats the theme in Thus Spoke Zarathustra (1883–85).
Debates and open questions
Whether he meant a warning, a celebration or a plain diagnosis is debated; the madman says the news 'has not yet reached' people.
▸Friedrich Nietzsche proposed The will to power and the ÜbermenschWell documented
The connection
Rejecting Schopenhauer's pessimism and the focus on mere survival he saw in Darwinism, Nietzsche proposed that living things seek above all to expand their power. From this he drew his ideal of the Übermensch, strong enough to create values after God's death, and the test of 'eternal recurrence': could you will your life again forever?
When and how
Introduced in Thus Spoke Zarathustra (1883–85), written in Sils Maria, Switzerland, and on the Riviera in Italy and France, and developed in Beyond Good and Evil (1886).
How we know
The ideas appear in his published books; the posthumous The Will to Power (1901), compiled by his sister, is less reliable.
Debates and open questions
Nietzsche abandoned plans for a book titled The Will to Power, and scholars dispute how central the idea was to his mature thought.
▸Friedrich Nietzsche wrote On the Genealogy of MoralsWell documented
The connection
Feeling Beyond Good and Evil had been misunderstood, Nietzsche wrote this sharper follow-up. It turns his historical method on morality, asking not whether values are true but where they came from and what needs they served. It gives his fullest account of 'slave morality', guilt and the self-denying ideal of priests.
When and how
Written in Sils Maria, Switzerland, in July 1887 and published that November in Leipzig at his own expense.
How we know
The title page calls it 'a polemic' meant to supplement and clarify Beyond Good and Evil; his letters record its writing.
Debates and open questions
Scholars disagree whether it is meant as real history, a psychological thought experiment, or rhetoric to shake readers out of moral complacency.