I have been having a great time of late. Work of surpassing interest, a certain amount of excitement, and a knowledge that one was more or less directly participating in the winning of the War—what more can the heart of man desire? If only poor old Tarbet hadn't been killed—he was a dear pal of mine,—there wouldn't be a cloud on the horizon. Don't let the Mater and Pater get the wind up about my personal safety. At present I am quite safe; besides, I have wonderful luck. I was only saved by a miracle from being blown into the air last September on the Somme. I may get home on leave in the near future.
May 4th, 1917.
I rejoice to say that Ambrose has received the D.S.O. for that achievement referred to in my last letter. He more than deserves it. He had a most terrible experience. The D.S.O. for a subaltern is one of the very highest honours that the Army has to bestow. We are all very bucked about it, especially the O.A. section of the battalion.
How anomalous the War has become—the world's great Land Power striving to strike its decisive blow at sea, while the great Sea Power is endeavouring to strike its decisive blow on land! This double paradox will give much food for reflection to future historians. I am coming to the conclusion that without a complete knowledge of the facts it is well-nigh impossible to derive accurate deductions from History. It seems to me you can make History prove anything. To understand History in all its significance, one must be familiar also with literature, languages and science.
Talking of science, do you see that some modern scientists are throwing doubt on the original theory of Evolution? They admit the possibility of the modification of species through natural selection, but they dispute the theory that any broad change takes place in the genera of organisms. They do not even admit the possibility of the atrophy, through long disuse, of organs of which the animal no longer has need. They are forced to admit that many species and genera have become extinct—so much is proved by the skeletons of prehistoric beasts found from time to time under the earth's surface. But what they dispute is that there is any connection between those beasts and living animals. They say, for instance, that as far back as we have records, we find the horse practically the same, organically speaking, as he is to-day. They cast doubt, that is, on the theory that the horse is descended from the pterodactyl.
It is an interesting point, though there appears to be no essential difference between this new school and the thoroughgoing evolutionists; for both admit the principle of the survival of the fittest. To me the new school's conception seems to be grotesque. According to them, the world was originally full of an enormous number of animals, organisms and what not, of which some have up to date survived, and whose numbers will decrease until only a few certain types, or perhaps one certain type, will be left subsisting. That is a view that I cannot accept. But, of course, Nature has many checks on the propagation and the multiplication of species. Natural conditions do not permit of the existence of too many species or sub-species. But it is clear that there are types, call them genera, species, or what you will, that have, by virtue of some inherent fitness and flexibility of adaptation, survived and mastered other types.
The theory or principle of Natural Selection can also be applied to nations. As far back as we have any record, man was much the same sort of being as he is to-day. The genus, in fact, has not changed. It is now established that in the long distant past there was one great Aryan race in Central Asia, which has split up since then into the peoples and nations of modern Europe, India, Arabia, and so forth. Biologically speaking, these peoples have all some traits in common, but environment has wrought great changes and has created species. Between these species there are great differences, so great indeed that various of them are to-day engaged in a good old intertribal war.
But has the genus Man always borne the same sort of characteristics as those that distinguish him to-day? Or, on the other hand, is he descended from a kangaroo-rat through the long lineage of the pithecanthropus, the ape-man, the man-ape, and so forth? And why stop at the kangaroo-rat—the first mammal to bring forth its young alive? Why not continue his lineage right back to the original bi-cellular organism—protoplasm? If these are our humble beginnings, what a progression to Man, so "noble in reason, infinite in faculty"!
Speculations about the development of life are very fascinating. I hold very strongly to belief in the survival of the fittest. Accepting this theory, you can explain most of the apparent inconsistencies that exist in the world. But I must admit that there is at least a possibility that genera are not changed by environment, time or circumstances. Perhaps they exist until they become unfit, when they vanish. The genus may remain in existence as a permanency till it ceases to become fit to survive, but the species most certainly alters. The only point in dispute is, therefore: do genera become altered by environment, etc.? Or do they exist unaltered till they become unfit, when they just vanish from this sublunary scene? However this may be, the broad principle of natural selection seems to me to be unshakably established.
May 20th, 1917.