実は“Survival of Fitness”というフレーズはDarwinではなく、Herbert Spencer（27 April 1820 – 8 December 1903）という19世紀のイギリス人哲学者によって提唱されたらしい。
Herbert Spencer, a contemporary of Darwin’s, advanced the notion that societies could be understood as organisms, where individual humans could be thought of as cells, institutions played the role of organs, and development was driven by some loose analog of natural selection. It was Spencer, in fact, not Darwin, who coined the phrase “survival of fitness”.
