I want to know the answer to the following question:
What reason did David Quammen believe that On the Origin of Species was weakened in later editions?
All the background I'm provided with is that "James T. Costa said that because the book was an abstract produced in haste in response to Wallace's essay, it was more approachable than the big book on natural selection Darwin had been working on, which would have been encumbered by scholarly footnotes and much more technical detail.". Is that enough to answer the question?