I am well aware that in describing the effect of Darwin’s discovery on naturalists and on persons capable of serious reflection on the nature and attributes of God, I am leaving the vast mass of the British public out of account. I have pointed out elsewhere that the British nation does not consist of atheists and Plymouth Brothers; and I am not now going to pretend that it ever consisted of Darwinians and Lamarckians. The average citizen is irreligious and unscientific: you talk to him about cricket and golf, market prices and party politics, not about evolution and relativity, transubstantiation and predestination. Nothing will knock into his head the fateful distinction between Evolution as promulgated by Erasmus Darwin, and Circumstantial (so-called Natural) Selection as revealed by his grandson. Yet the doctrine of Charles reached him, though the doctrine of Erasmus had passed over his head. Why did not Erasmus Darwin popularize the word Evolution as effectively as Charles?
The reason was, I think, that Circumstantial Selection is easier to understand, more visible and concrete, than Lamarckian evolution. Evolution as a philosophy and physiology of the will is a mystical process, which can be apprehended only by a trained, apt, and comprehensive thinker. Though the phenomena of use and disuse, of wanting and trying, of the manufacture of weight lifters and wrestlers from men of ordinary strength, are familiar enough as facts, they are extremely puzzling as subjects of thought, and lead you into metaphysics the moment you try to account for them. But pigeon fanciers, dog fanciers, gardeners, stock breeders, or stud grooms, can understand Circumstantial Selection, because it is their business to produce transformation by imposing on flowers and animals a Selection From Without. All that Darwin had to say to them was that the mere chapter of accidents is always doing on a huge scale what they themselves are doing on a very small scale. There is hardly a laborer attached to an English country house who has not taken a litter of kittens or puppies to the bucket, and drowned all of them except the one he thinks the most promising. Such a man has nothing to learn about the survival of the fittest except that it acts in more ways than he has yet noticed; for he knows quite well, as you will find if you are not too proud to talk to him, that this sort of selection