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Darwin's theory of evolution
1859 (On the Origin of Species)· Idea or argument· Knowledge, logic & science
Well documentedSolid records, texts or physical evidence.
Charles Darwin's 1859 theory that species evolve by natural selection, explaining nature's apparent design without a designer.
See it on the Philosophy map →The idea
The idea: living things vary, more are born than survive, and those with helpful traits leave more offspring, so over many generations species change and split. Darwin built it from his 1831–36 voyage on HMS Beagle, breeders' records and Malthus's essay on population; Alfred Russel Wallace reached the same idea independently in 1858. For philosophy, it undercut William Paley's watch-and-watchmaker argument for God and placed humans within nature. Main objection, to its philosophical misuse: what evolution favors is not thereby good.
Why it matters
It changed debates about God, human nature, mind and morality, and inspired thinkers from Nietzsche to pragmatists like Dewey.
Where it comes from
On the Origin of Species (1859) and The Descent of Man (1871), backed since by fossils, genetics and DNA, which confirm common descent overwhelmingly.
Still debated
How far evolution can explain morality, reason and religion, and whether it supports or undermines trust in our own beliefs, is still debated.
Connections (3)
▸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.
▸Darwin's theory of evolution undercut the design argument in Does God exist?Mostly agreed
The connection
The design argument held that living things fit their lives so well that a designer must exist, as a watch implies a watchmaker (Paley). Natural selection explained that fit through variation and differential survival over long ages, undercutting what many saw as the strongest evidence-based argument for God.
When and how
England, On the Origin of Species (1859); Darwin had studied Paley's Natural Theology at Cambridge.
How sure are we?
Darwin's Autobiography says natural selection made Paley's argument fail; reviews and debates of the 1860s show the impact.
Debates and open questions
Whether evolution refutes design or only moves it to the laws of nature, as theistic evolutionists argue, is still disputed.
▸Darwin's theory of evolution shaped the naturalism of John Dewey: democracy, education and inquiryWell documented
The connection
Darwin showed that living things, humans included, are shaped by adapting to changing environments, with no fixed purpose built in. Dewey drew the lesson for philosophy: the mind is a tool for coping with problems, ideas are hypotheses to test, and there are no eternal truths. Inquiry, morality and democracy became ongoing experiments.
When and how
Dewey set out the link in his lecture 'The Influence of Darwin on Philosophy' at Columbia University in 1909, fifty years after On the Origin of Species.
How we know
Dewey states the influence explicitly in that essay and later works; he also absorbed Darwin through William James's psychology.
Debates and open questions
Historians debate how much Dewey's naturalism came from Darwin directly versus from Hegel, whose idea of development shaped his early thought.