Charles Darwin
1809–1882
Explained the appearance of design without a designer, which reshaped philosophy as much as biology.
- 1809LifeBorn
- 1859EventOn the Origin of Species (1859) rests on three observations and one inference.
- 1871EventThe Descent of Man (1871) placed humans inside the same process, which unsettled accounts of morality, reason and the soul that had assumed a…
- 1882LifeDies
Charles Darwin was an English naturalist whose account of evolution by natural selection is among the most consequential ideas ever proposed, and whose philosophical implications are still being worked through.
The argument
On the Origin of Species (1859) rests on three observations and one inference. Organisms vary. Some variation is heritable. More are born than can survive. Therefore variations that help an organism survive and reproduce become more common over generations.
The mechanism requires no foresight and no goal. What looks designed is the accumulated residue of differential survival.
Why philosophy had to respond
The design argument. Before Darwin, the appearance of purpose in organisms was the strongest argument for a designer, and Hume's attack on it had lacked an alternative explanation. Darwin supplied one. See natural theology.
Teleology. Aristotelian final causes had survived in biology long after physics abandoned them, because hearts obviously seemed to be for something. Natural selection explains that language without purposes: a heart is for pumping blood because pumping blood is why hearts were selected. See telos.
Human nature. The Descent of Man (1871) placed humans inside the same process, which unsettled accounts of morality, reason and the soul that had assumed a discontinuity.
What it does not settle
Darwin explains how complexity arises, not why there is anything at all — the cosmological argument is untouched. And the naturalistic fallacy applies with force: that a trait was selected says nothing about whether it is good. Evolutionary claims about ethics routinely slide across the is-ought gap, which is a mistake about logic rather than about biology.
Questions
What did Darwin argue?
That heritable variation plus competition for limited resources causes traits aiding survival and reproduction to become more common, which explains apparent design without a designer.
Why does Darwin matter to philosophy?
He supplied the alternative explanation that the design argument had lacked, and gave a way to use purpose-language in biology without positing purposes.
Does evolution tell us how to live?
No. That a trait was selected says nothing about whether it is good. Deriving ethics from evolutionary facts crosses the is-ought gap without justification.