Nah, I don't buy that. The claim is made by some that Darwin's persistent
health problems were psychological in nature, related to his guilt in letting
out a "godless doctrine" he knew to be false. I don't think so.
I do believe he suffered, though, over what he had wrought. He was married to
a devout Christian who stood by her beliefs even as Darwin was losing his. He
was, by nature, a sensitive soul, but was to be castigated by religious
quarters the rest of his life. He once commented that publishing his theory
was like "confessing a murder." There is enough to conclude the man suffered
major stress.
If you were implicated in the death of God and the incipient breakdown of
Western Civilization, wouldn't you be stressed out a bit, too?
Jim