What happened was that Aveling's mistress was Marx's daughter, and when both Darwin and Marx were dead, Marx's papers became muddled up with Aveling's papers, and a letter from Darwin saying, "My dear sir, thank you very much but I don't want you to dedicate your book to me," was mistakenly supposed to be addressed to Marx, and that gave rise to this whole myth, which you've probably heard.
다윈과 막스 모두 작고한 후에 막스의 논문이 에이블링의 논문과 섞여 뒤죽박죽되었는데 다윈이 보낸 편지에 "선생님, 매우 감사하지만 당신의 책을 제게 헌정하는 것을 원치 않습니다"라는 구절이 막스에게 보낸 것이라고 오인된 것입니다. 이게 바로 여러분이 들어봤을 전설의 유래입니다. 일종의 도시전설로서