Leon C. Megginson
"Lessons from Europe for American Business", Southwestern Social Science Quarterly, 1963
Megginson was talking to business leaders about adapting to competition. Darwin never wrote about companies, and the sentence is not found in his books.
the myth (Charles Darwin): A business professor paraphrased Darwin's ideas in a 1963 article. The paraphrase then lost the professor's name and gained Darwin's, even though it appears nowhere in Darwin's work.
Source: Wikiquote