= Peter Kropotkin
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Writer on <evolution> whose \i[Mutual Aid] examined <cooperation> among <animals>. Kropotkin emphasized that relations among <organisms> include mutual support, placing cooperative behavior within the discussion of survival and evolutionary explanation.<Mutual Aid: A Factor of Evolution by Peter Kropotkin>[Author list and described study]{ref}
\Image[https://upload.wikimedia.org/wikipedia/commons/5/59/Peter_Kropotkin_circa_1900.jpg]
{title=Portrait of <Peter Kropotkin>}
{description=F. Nadar; source: NYPL. Public domain (author died 1910; published before 1931). https://commons.wikimedia.org/wiki/File:Peter_Kropotkin_circa_1900.jpg#Licensing[Source usage terms], via Wikimedia Commons.}
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