Darwin's Wife

I noticed in the chapter on Darwin, that he refused to discuss his theories with his wife, out of respect for the amount of religious faith she incorporated into her life- moreover, as Pojman recalls, Darwin hesitated to publish his Origin of Species for the same reason; the effect it may have one other religiously minded people.

This post is not focused on the metaphysical comparisons between evolution and religion, nor is it concerned with the ethics of the usage (or lack thereof) of information   What I am really getting at here, is the reason for Darwin's hesitation to publish his theory.

While it is very reasonable to suspect fear of persecution as the primary motive (and I am not aware that Darwin himself was or was not persecuted after publishing) I would pose the question; did Darwin feel that his theory detracted from the presence of morality in a given society?