The movie is based on the book, "Annie's Box: Charles Darwin, his Daughter, and Human Evolution", written by a great-great-grandson of Darwin, Randal Keynes (in the U.K. in 2001; it was published in the U.S. in 2002 under the title, "Darwin, His Daughter, and Human Evolution").

From that site's discussion of the book (aboutdarwin.com):

The book "...is unlike any other Darwin biography - the majority of which try to encompass the entire spectrum of Darwin's life. Annie's Box is different in that it focuses on the private life of Charles Darwin. "

"What really makes this book stand out from others on Darwin's life is that nearly all the content is previously unpublished material."

I agree with Amos's points. It seems to me, that in most cases of discussions on this topic where one side entirely negates the validity of the other, either a flawed understanding of science or a flawed understanding of theology is involved.

~ Becky in Tucson