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For most of his adult life [[Charles Darwin]] suffered from very poor health.<ref>http://www.answersingenesis.org/creation/v17/i4/darwins_illness.asp</ref> The 1992 ''New Encyclopedia Britannica '' stated that Darwin's illness was [[psychogenic]] in origin (A psychogenic illness is one that originates in the mind or in mental condition). <ref>http://www.answersingenesis.org/creation/v17/i4/darwins_illness.asp</ref> A 1997 article in the [[Journal of the American Medical Association]] declared concerning Darwin's illness that the "variable intensity of symptoms and chronic, prolonged course without physical deterioration also indicate that his illness was psychiatric." <ref>''Charles Darwin and Panic Disorder''" by Thomas J. Barloon, MD and Russel Noyes, Jr., January 8, 1997 [[Journal of the American Medical Association]]</ref> In addition, a journal article in the [[American Journal of Medicine]] states that Darwin suffered from "[[psychoneurosis]] provoked and exaggerated by his [[theory of evolution|evolutionary]] ideas".<ref>"The Illness of Charles Darwin", William B. Bean, September 1978, American Journal of Medicine</ref> The American Journal of Medicine article also stated that his Darwin's wife, Emma, greatly disapproved of his evolutionist ideas and "This, facsimile of public reaction, must have kept lively his anxiety and torment". <ref>"The Illness of Charles Darwin", William B. Bean, September 1978, American Journal of Medicine</ref>