How did DNA fit into ‘Darwin’s complete works?’
Oops, he was right about everything except our most basic components. I’m sure the rest is equally valid.
Darwin was not a prophet who had to be in touch with some absolute source of information, was infallible, and lived a life above reproach.
Darwin was a scientist. All he had to do was construct a theoretical framework that helped to explain and predict observances. He did. His theory was of so much use that it is still being used, mostly as he formulated it, some hundred and fifty years later.
Anyone that limits Darwin's actual works to "a few finches and their beak differences" doesn't know what they're talking about.