you then can just make up what he thought. I'm reading a philosopher right now -- don't want to go into details, as I'm reviewing the book for a magazine -- who declares that it is an implication of Darwin's theory of evolution that all life is the product of chance variations that arise randomly. Well, what did Charles himself say about that idea?
“I have hitherto sometimes spoken as if the variations so common and multiform in organic beings under domestication, and in a lesser degree in those in a state of nature had been due to chance. This, of course, is a wholly incorrect expression, but it serves to acknowledge plainly our ignorance of the cause of each particular variation.” -- Origin of Species, Chapter 5
So Darwin thought the idea that these variations were chance was "Wholly incorrect," a mere product of our lack of knowledge of their true causes.