“From the point of view of the moralist the animal world is on about the same level as a gladiator's show. The creatures are fairly well treated, and set to fight—whereby the strongest, the swiftest and the cunningest live to fight another day. The spectator has no need to turn his thumbs down, as no quarter is given.”
[The Struggle for Existence: A Programme, The Nineteenth Century, 23, February 1888, 161–180, https://babel.hathitrust.org/cgi/pt?id=uc1.a0012287587&view=1up&seq=173] (quote from p. 163)
1880s
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Thomas Henry Huxley 127
English biologist and comparative anatomist 1825–1895Related quotes

The Art of Poetry on a New Plan (1761), vol. ii. p. 147.
The saying "he who fights and runs away may live to fight another day" dates at least as far back as Menander (ca. 341–290 B.C.), Gnomai Monostichoi, aphorism #45: ἀνήρ ὁ ϕɛύγων καὶ ράλίν μαχήɛṯαί (a man who flees will fight again). The Attic Nights (book 17, ch. 21) of Aulus Gellius (ca. 125–180 A.D.) indicates it was already widespread in the second century: "...the orator Demosthenes sought safety in flight from the battlefield, and when he was bitterly taunted with his flight, he jestingly replied in the well-known verse: The man who runs away will fight again".

http://www.independent.co.uk/sport/football/take-a-tour-of-english-football-grounds-with-chris-kamara-9928156.html

To Captain Best, quoted in "Heinrich Müller: Gestapo Chief" - Page 59 - by Mark Beyer - 2001
Source: Work and the nature of man, 1966, p. 71

As quoted in the October 2006 publication of Field Manual 6-22 (FM-22-100): Army Leadership by Headquarters, Department of the Army, p. 4-5

Source: For The Sake of Heaven (1945), p. 44