Herbert Spencer
(1820–1903)
xxx xxxx
http://www.utm.edu/research/iep/s/spencer.htm
http://www.fordham.edu/halsall/modspencer-darwin.html
http://www2.truman.edu/~rgraber/cultev/spencer.html
http://epistemelinks.com/Main/TextName.asp?PhilCode=Spen
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