René Descartes

French philosopher, mathematician, and scientist (1596–1650)

  • Fame88.7
  • Momentum0.0
  • Global rank#97
Source-basedFalling
  • Fame88.7
  • Momentum0.0
  • Global rank#97
  • France rank#5
  • Academics rank#12
  • Wikipedia147.3K
Lived 1596–1650, aged 54France
  • Wikipedia
    181 languages
    Cross-language footprint
  • Global rank
    #97
    Fame.am leaderboard
  • Era
    1596–1650
    Aged 54
Summary
Updated 2026-08-13

He connected geometry and algebra into a single field, gave the coordinate system his name, and opened modern philosophy with five words: "I think, therefore I am."

Biography

About

Born in France on 31 March 1596, Descartes refused to accept the authority of previous philosophers and set out to build knowledge from the ground up. Mathematics was paramount to his method — he merged geometry and algebra into analytic geometry, a fusion that later enabled infinitesimal calculus. In the opening of Passions of the Soul, his treatise on emotions, he declared he would write "as if no one had written on these matters before." His Meditations on First Philosophy anchored epistemology at the center of 17th-century thought and made him a key figure in the Scientific Revolution. He…

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In their own words

Sourced, dated quotes from René Descartes

René Descartes
said
Mr. Clerselier has written me that you are expecting from him my Meditations... in order to present them to the queen of the land.
Letter to (Nov. 1, 1646) as quoted by , Descartes' Secret Notebook (2005) citing René Descartes: Correspondance avec Elizabeth et autres
René Descartes
said
In order to seek truth, it is necessary once in the course of our life, to doubt, as far as possible, of all things.
cite book
René Descartes
said
No doubt you know that Galileo had been convicted not long ago by the Inquisition, and that his opinion on the movement of the Earth had been condemned as heresy.
Letter to Marin Mersenne (end of Feb., 1634) as quoted by , Pendulum: Leon Foucault and the Triumph of Science (2003)
René Descartes
saidundated
The entire method consists in the order and arrangement of the things to which the mind's eye must turn so that we can discover some truth.
Rules for the Direction of the Mind: X.379
René Descartes
saidundated
No more useful inquiry can be proposed than that which seeks to determine the nature and the scope of human knowledge. ...
Rules for the Direction of the Mind in Key Philosophical Writings (1997), pp. 29-30
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88.7
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    wikipedia · en.wikipedia.org
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    wikidata · wikidata.org
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    database · pantheon.world
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