
“Man is a rational animal – so at least I have been told.”
Often paraphrased as "It has been said that man is a rational animal. All my life I have been searching for evidence which could support this."
1950s, Unpopular Essays (1950)
Context: Man is a rational animal – so at least I have been told. Throughout a long life, I have looked diligently for evidence in favor of this statement, but so far I have not had the good fortune to come across it, though I have searched in many countries spread over three continents.
Help us to complete the source, original and additional information
Bertrand Russell 562
logician, one of the first analytic philosophers and politi… 1872–1970Related quotes


“Man is not a rational animal; he is a rationalizing animal.”
Source: Tunnel in the Sky (1955), Chapter 2, “The Fifth Way” (p. 42)

Source: The Economic Problem (1925), Chapter I, "The Problem Profounded", p. 1

page 277
John of the Mountains, 1938

Source: Letters from the Earth: Uncensored Writings

3, 18, 1
On Abstinence from Killing Animals

“Of all the ways of defining man, the worst is the one which makes him out to be a rational animal.”
De toutes les définitions de l'homme, la plus mauvaise me paraît celle qui en fait un animal raisonnable.
Le Petit Pierre (1918), ch. XXXIII