^ "Herbert Spencer in his ''Principles of Biology'' of 1864, vol. 1, p. 444, wrote: 'This survival of the fittest, which I have here sought to express in mechanical terms, is that which Mr. Darwin has called "natural selection", or the preservation of favoured races in the struggle for life.'" {{Citation | url=http://works.bepress.com/cgi/viewcontent.cgi?article=1000&context=maurice_stucke | title=Better Competition Advocacy | accessdate=29 August 2007 | author=Maurice E. Stucke}}, citing HERBERT SPENCER, THE PRINCIPLES OF BIOLOGY 444 (Univ. Press of the Pac. 2002.)</ref>
استجاب [[داروين]] بشكل إيجابي لاقتراح [[ألفريد راسل والاس]] باستخدام المصطلح الجديد لبقاء سبنسر "البقاء للأصلح" كبديل عن "[[اصطفاء طبيعي|الانتقاء الطبيعي]]" واعتمد العبارة في "تنوع [[الحيوانات]] و[[النباتات]] تحت إعادة التوطين" المنشورة في [[عام]] [[1868]].قدمالعبارة<ref فيname=sotf/><ref الطبعةname="Variation الخامسة">"This ،preservation, التيduring نشرتthe فيbattle [[عام]]for [[1869]]life, ،of المقصودvarieties منهاwhich أنpossess تعنيany advantage in structure, constitution, or instinct, I have called Natural Selection; and Mr. Herbert Spencer has well expressed the same idea by the Survival of the Fittest. The term "مصممةnatural بشكلselection" أفضلis لبيئةin محليةsome فوريةrespects a bad one, as it seems to imply conscious choice; but this will be disregarded after a little familiarity." {{citation | last=Darwin | first=Charles | author-link =Charles Darwin | year=1868 | title=The Variation of Animals and Plants under Domestication | edition=1st |volume=1 | location=London | publisher =John Murray | page=6 | url=http://darwin-online.org.uk/content/frameset?pageseq=21&itemID=F877.1&viewtype=text | accessdate =10 August 2015 }}</ref> <ref name=1stD>{{Citation | last = Freeman | first =R. B. | year = 1977 | contribution =On the Origin of Species | contribution-url =http://darwin-online.org.uk/EditorialIntroductions/Freeman_OntheOriginofSpecies.html | title =The Works of Charles Darwin: An Annotated Bibliographical Handlist | edition =2nd | location =Cannon House, Folkestone, Kent, England | publisher =Wm Dawson & Sons Ltd }}</ref><ref name=OriginCh4>"This preservation of favourable variations, and the destruction of injurious variations, I call Natural Selection, or the Survival of the Fittest." – {{Citation | last=Darwin | first=Charles | year=1869 | title=On the Origin of Species by Means of Natural Selection, or the Preservation of Favoured Races in the Struggle for Life | edition=5th | location=London
| publisher =John Murray | pages=91–92 | url=http://darwin-online.org.uk/content/frameset?viewtype=side&itemID=F387&pageseq=121 | accessdate =22 February 2009 }}</ref> قدم العبارة في الطبعة الخامسة ، التي نشرت في [[عام]] [[1869]] ، المقصود منها أن تعني "مصممة بشكل أفضل لبيئة محلية فورية".
