When man was in the hunting stage of development, wide areas were necessary for the maintenance of scant populations. With the shepherd stages, the means of subsistence being increased, a larger population was supported on the same territory. The agricultural stage gave support to a still larger population; and, to-day, with the increased food-getting efficiency of a machine civilisation , an even larger population is made possible. Nor is this theoretical. The population is here, a billion and three quarters of men, women, and children, and this vast population is increasing on itself by leaps and bounds.
A heavy European drift to the New World has gone on and is going on; yet Europe, whose population a century ago was 170,000,000, has to-day 500,000,000. At this rate of increase, provided that subsistence is not overtaken, a century from now the population of Europe will be 1,500,000,000. And be it noted of the present rate of increase in the United States that only one-third is due to immigration, while two-thirds is due to excess of births over deaths. And at this present rate of increase, the population of the United States will be 500,000,000 in less than a century from now.
Man, the hungry one, the killer, has always suffered for lack of room. The world has been chronically overcrowded. Belgium with her 572 persons to the square mile is no more crowded than was Denmark when it supported only 500 palaeolithic people. According to Mr. Woodruff, cultivated land will produce 1600 times as much food as hunting land. From the time of the Norman Conquest, for centuries Europe could support no more than 25 to the square mile. To-day Europe supports 81 to the square mile. The explanation of this is that for the several centuries after the Norman Conquest her population was saturated. Then, with the development of trading and capitalism, of exploration and exploitation of new lands, and with the invention of labour -saving machinery and the discovery and application of scientific principles, was brought about a tremendous increase in Europe's food-getting efficiency. And immediately her population sprang up.
According to the census of Ireland, of 1659, that country had a population of 500,000. One hundred and fifty years later, her population was 8,000,000. For many centuries the population of Japan was stationary. There seemed no way of increasing her food-getting efficiency. Then, sixty years ago, came Commodore Perry, knocking down her doors and letting in the knowledge and machinery of the superior food- getting efficiency of the Western world. Immediately upon this rise in subsistence began the rise of population; and it is only the other day that Japan, finding her population once again pressing against subsistence, embarked, sword in hand, on a westward drift in search of more room. And, sword in hand, killing and being killed, she has carved out for herself Formosa and Korea, and driven the vanguard of her drift far into the rich interior of Manchuria.
For an immense period of time China's population has remained at 400,000,000--the saturation point. The only reason that the Yellow River periodically drowns millions of Chinese is that there is no other land for those millions to farm. And after every such catastrophe the wave of human life rolls up and now millions flood out upon that precarious territory. They are driven to it, because they are pressed remorselessly against subsistence. It is inevitable that China, sooner or later, like Japan, will learn and put into application our own superior food-getting efficiency. And when that time comes, it is likewise inevitable that her population will increase by unguessed millions until it again reaches the saturation point. And then, inoculated with Western ideas, may she not, like Japan, take sword in hand and start forth colossally on a drift of her own for more room? This is another reputed bogie--the Yellow Peril; yet the men of China are only men, like any other race of men, and all men, down all history, have drifted hungrily, here, there and everywhere over the planet, seeking for something to eat. What other men do, may not the Chinese do?
But a change has long been coming in the affairs of man. The more recent drifts of the stronger races, carving their way through the lesser breeds to more earth-space, has led to peace, ever to wider and more lasting peace. The lesser breeds, under penalty of being killed, have been compelled to lay down their weapons and cease killing among themselves . The scalp-talking Indian and the head-hunting Melanesian have been either destroyed or converted to a belief in the superior efficacy of civil suits and criminal prosecutions. The planet is being subdued. The wild and the hurtful are either tamed or eliminated. From the beasts of prey and the cannibal humans down to the death-dealing microbes, no quarter is given; and daily, wider and wider areas of hostile territory, whether of a warring desert-tribe in Africa or a pestilential fever-hole like Panama, are made peaceable and habitable for mankind. As for the great mass of stay-at-home folk, what percentage of the present generation in the United States, England, or Germany, has seen war or knows anything of war at first hand? There was never so much peace in the world as there is to-day.
War itself, the old red anarch , is passing. It is safer to be a soldier than a working-man. The chance for life is greater in an active campaign than in a factory or a coal-mine. In the matter of killing, war is growing impotent, and this in face of the fact that the machinery of war was never so expensive in the past nor so dreadful. War-equipment to- day, in time of peace, is more expensive than of old in time of war. A standing army costs more to maintain than it used to cost to conquer an empire. It is more expensive to be ready to kill, than it used to be to do the killing. The price of a Dreadnought would furnish the whole army of Xerxes with killing weapons. And, in spite of its magnificent equipment, war no longer kills as it used to when its methods were simpler. A bombardment by a modern fleet has been known to result in the killing of one mule. The casualties of a twentieth century war between two world-powers are such as to make a worker in an iron-foundry turn green with envy. War has become a joke. Men have made for themselves monsters of battle which they cannot face in battle. Subsistence is generous these days, life is not cheap, and it is not in the nature of flesh and blood to indulge in the c*****e made possible by present-day machinery. This is not theoretical, as will be shown by a comparison of deaths in battle and men involved, in the South African War and the Spanish-American War on the one hand, and the Civil War or the Napoleonic Wars on the other.
Not only has war, by its own evolution, rendered itself futile, but man himself , with greater wisdom and higher ethics, is opposed to war. He has learned too much. War is repugnant to his common sense. He conceives it to be wrong, to be absurd, and to be very expensive. For the damage wrought and the results accomplished, it is not worth the price. Just as in the disputes of individuals the arbitration of a civil court instead of a blood feud is more practical, so, man decides, is arbitration more practical in the disputes of nations.
War is passing, disease is being conquered, and man's food-getting efficiency is increasing. It is because of these factors that there are a billion and three quarters of people alive to-day instead of a billion, or three-quarters of a billion. And it is because of these factors that the world's population will very soon be two billions and climbing rapidly toward three billions. The lifetime of the generation is increasing steadily. Men live longer these days. Life is not so precarious. The newborn infant has a greater chance for survival than at any time in the past. Surgery and sanitation reduce the fatalities that accompany the mischances of life and the ravages of disease. Men and women, with deficiencies and weaknesses that in the past would have effected their rapid extinction, live to-day and father and mother a numerous progeny. And high as the food-getting efficiency may soar, population is bound to soar after it. "The abysmal fecundity" of life has not altered. Given the food, and life will increase. A small percentage of the billion and three-quarters that live to-day may hush the clamour of life to be born, but it is only a small percentage. In this particular, the life in the man-animal is very like the life in the other animals.
And still another change is coming in human affairs. Though politicians gnash their teeth and cry anathema, and man, whose superficial book-learning is vitiated by crystallised prejudice, assures us that civilisation will go to smash, the trend of society, to-day, the world over, is toward socialism. The old individualism is passing. The state interferes more and more in affairs that hitherto have been considered sacredly private. And socialism, when the last word is said, is merely a new economic and political system whereby more men can get food to eat. In short, socialism is an improved food-getting efficiency.
Furthermore, not only will socialism get food more easily and in greater quantity, but it will achieve a more equitable distribution of that food. Socialism promises, for a time, to give all men, women, and children all they want to eat, and to enable them to eat all they want as often as they want. Subsistence will be pushed back, temporarily, an exceedingly long way. In consequence, the flood of life will rise like a tidal wave. There will be more marriages and more children born. The enforced sterility that obtains to-day for many millions, will no longer obtain. Nor will the fecund millions in the slums and labour -ghettos, who to-day die of all the ills due to chronic underfeeding and overcrowding, and who die with their fecundity largely unrealised , die in that future day when the increased food-getting efficiency of socialism will give them all they want to eat.
It is undeniable that population will increase prodigiously-just as it has increased prodigiously during the last few centuries, following upon the increase in food-getting efficiency. The magnitude of population in that future day is well nigh unthinkable. But there is only so much land and water on the surface of the earth. Man, despite his marvellous accomplishments, will never be able to increase the diameter of the planet. The old days of virgin continents will be gone. The habitable planet, from ice-cap to ice-cap, will be inhabited. And in the matter of food-getting, as in everything else, man is only finite. Undreamed-of efficiencies in food-getting may be achieved, but, soon or late, man will find himself face to face with Malthus' grim law. Not only will population catch up with subsistence, but it will press against subsistence, and the pressure will be pitiless and savage. Somewhere in the future is a date when man will face, consciously, the bitter fact that there is not food enough for all of him to eat.
When this day comes, what then? Will there be a recrudescence of old obsolete war? In a saturated population life is always cheap, as it is cheap in China, in India, to-day. Will new human drifts take place, questing for room, carving earth-space out of crowded life. Will the Sword again sing:
"Follow, O follow , then, Heroes, my harvesters! Where the tall grain is ripe Thrust in your sickles! Stripped and adustIn a stubble of empire Scything and binding The full sheaves of sovereignty."
Even if, as of old, man should wander hungrily, sword in hand, slaying and being slain, the relief would be only temporary. Even if one race alone should hew down the last survivor of all the other races, that one race, drifting the world around, would saturate the planet with its own life and again press against subsistence. And in that day, the death rate and the birth rate will have to balance. Men will have to die, or be prevented from being born. Undoubtedly a higher quality of life will obtain, and also a slowly decreasing fecundity. But this decrease will be so slow that the pressure against subsistence will remain. The control of progeny will be one of the most important problems of man and one of the most important functions of the state. Men will simply be not permitted to be born.