i said big bang related science in reference to the science related to the origins to the start of the universe and eventually the makings of our planet as opposed to beliefs that any deity created anything.
and yes by Darwinism i meant natural selection as the process of the strong surviving and passing on favorable traits through genetics and DNA, rather than every creature all being created at once in the beginning and never changing, (which honestly was disproved by the first fossil found that showed evolution of any species) because after all if one creature evolved most religions are wrong because they claim they created every creature as is, and man as an image of himself as is the case of Christianity.
Darwin of course felt conflicted being raised and taught as a christian, like most scientist this is the case, even presently, regardless of what they discover even if it disproves the basis of the religion they follow, after all it is hard to go against what your parents told you all your life and raised you to believe, and not to mention that society was probably the least excepting society of any idea that wasn't god and Jesus and Christianity,
no science back then was based on dna, and you cant expect it to be, the technology wasn't created yet, that does not mean the fossils found back then are to be disregarded. does it? nay lol
if i recall correctly he did agonize it, not because his theological beliefs but because after it was published alot of his peers and colleges would shun the idea and him and would not accept anything he did ever and everything he work hard to discover would have been disregardful as he would have been labeled something like a person who belittles the church or whatever.