The struggle for existence, as expressed in human combat, does not necessarily result in the survival of the most desirable, so far as we are able to define desirability. We are confusing very unlike situations in our easy application of the struggle for existence to war. The struggle is not now between individuals to decide the fitter; it is between vast bodies hurling death by wholesale. We pick the physically fit and send them to the battle-line; and these fit are slain. This is not the situation in nature from which we draw our illustrations. Moreover, the final test of fitness in nature is adaptation, not power. Adaptation and adjustment mean peace, not war. Physical force has been immensely magnified in the human sphere; we even speak of the great nations as "powers," a terminology that some day we shall regret. The military method of civilization finds no justification in the biological struggle for existence.
The final conquest of a man is of himself, and he shall then be greater than when he takes a city. The final conquest of a society is of itself, and it shall then be greater than when it conquers its neighboring society.
Man now begins to measure himself against nature also, and he begins to see that herein shall lie his greatest conquests beyond himself; in fact, by this means shall he conquer himself,—by great feats of engineering, by completer utilization of the possibilities of the planet, by vast discoveries in the unknown, and by the final enlargement of the soul; and in these fields shall be the heroes. The most virile and upstanding qualities can find expression in the conquest of the earth. In the contest with the planet every man may feel himself grow.
What we have done in times past shows the way by which we have come; it does not provide a program of procedure for days that are coming; or if it does, then we deny the effective evolution of the race. We have passed witchcraft, religious persecution, the inquisition, subjugation of women, the enslavement of our fellows except alone enslavement in war.
Here I come particularly to a consideration of the struggle for existence. Before I enter on this subject, I must pause to say that I would not of myself found an argument either for war or against it on the analogies of the struggle for existence. Man has responsibilities quite apart from the conditions that obtain in the lower creation. Man is a moral agent; animals and plants are not moral agents. But the argument for war is so often founded on this struggle in nature, that the question must be considered.
It has been persistently repeated for years that in nature the weakest perish and that the victory is with the strong, meaning by that the physically powerful. This is a false analogy and a false biology. It leads men far astray. It is the result of a misconception of the teaching of evolution.
Our minds dwell on the capture and the carnage in nature,—the hawk swooping on its prey, the cat stealthily watching for the mouse, wolves hunting in packs, ferocious beasts lying in wait, sharks that follow ships, serpents with venomous fangs, the vast range of parasitism; and with the poet we say that nature is "red in tooth and claw." Of course, we are not to deny the struggle of might against might, which is mostly between individuals, and of which we are all aware; but the weak and the fragile and the small are the organisms that have persisted. There are thousands of little and soft things still abundant in the world that have outlived the fearsome ravenous monsters of ages past; there were Goliaths in those days, but the Davids have outlived them, and Gath is not peopled by giants. The big and strong have not triumphed.
The struggle in nature is not a combat, as we commonly understand that word, and it is not warfare. The earth is not strewn with corpses.
I was impressed in reading Roosevelt's "African Game Trails" with the great extent of small and defenseless and fragile animal life that abounds in the midst of the terrible beasts,—little uncourageous things that hide in the crevices, myriads that fly in the air, those that ride on the rhinos, that swim and hide in the pools, and bats that hang in the acacia-trees. He travelled in the region of the lion, in the region that "holds the mightiest creatures that tread the earth or swim in its rivers; it also holds distant kinsfolk of these same creatures, no bigger than woodchucks, which dwell in crannies of the rocks, and in the tree tops. There are antelope smaller than hares and antelope larger than oxen. There are creatures which are the embodiment of grace; and others whose huge ungainliness is like that of a shape in a nightmare. The plains are alive with droves of strange and beautiful animals whose like is not known elsewhere." The lion is mighty; he is the king of beasts; but he keeps his place and he has no kingdom. He has not mastered the earth. No beast has ever overcome the earth; and the natural world has never been conquered by muscular force.
Nature is not in a state of perpetual enmity, one part with another.