It is written with earnestness and in excellent English; it must mean something. But what can it mean? How could physical science prove that man is not depraved? You do not cut a man open to find his sins. You do not boil him until he gives forth the unmistakable green fumes of depravity. How could physical science find any traces of a moral fall? What traces did the writer expect to find? Did he expect to find a fossil Eve with a fossil apple inside her? Did he suppose that the ages would have spared for him a complete skeleton of Adam attached to a slightly faded fig-leaf? The whole paragraph which I have quoted is simply a series of inconsequent sentences, all quite untrue in themselves and all quite irrelevant to each other. Science never said that there could have been no Fall.
G. K. Chesterton, All Things Considered, page 210