The hypothesis of natural selection may not be a complete explanation, but it led to a greater thing than itself---an acceptance of the theory of organic evolution, which the years have but confirmed.

【翻译】“物竞天择”学说，可能不是一个完美的诠释，但它产生了一个比它本身更伟大的东西——对有机进化理论的接受，这是多年来已经证实了的。