I want to know the answer to the following question:
What element of On the Origin of Species ensured that the book would be taken seriously by scientists?
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?