We know Darwin himself avoided the word evolution until the 6th edition of Origin of Species in part because of the baggage of Spencer's "evolution" (and his dislike of Spencer.) But he also benefited mightily by the moods sweeping intellectual circles of the time; after all the Origin of Species is a rather dry tome and that it so suddenly swept up and invigorated popular imagination as it did would be a real curiosity if we didn't know the context of the milieu it was published. Which is why it is one of most seminal texts of 19th century, but along with Jacob Grimm's Deutsche Grammatik; provided a rationalization for a rather dark kind of humanism.Typhoon wrote:The textbook in question was A Civic Biology: Presented in Problems, authored by George William Hunter, which espoused the then popular beliefs regarding eugenics.
As such, the section in question was a gross misinterpretation and unsupported extrapolation of Darwin's work and the resulting theory of evolution.In the first edition of Civic Biology, Hunter briefly discusses eugenics on one page of the 432 page textbook. Along with many other evolutionary biologists, Hunter embraced the idea of eugenics as a social doctrine. It was a popular idea in the early 20th century, and several states had enacted laws to compel the sexual segregation and sterilization of people deemed eugenically unfit. Hunter believed that society could perfect the human race by preventing intermarriage between people such as the mentally ill, criminals, and epileptics. Hunter also believed that the Caucasian race was the highest type of all the races.
Ultimately like a lot of ideas floating in the aether, you can't control who picks what up and how ideas are organized.