Nor what Malthus failed to show has any one since him shown. The globe may be surveyed and history may be reviewed in vain for any instance of a considerable country20 in which poverty and want can be fairly attributed to the pressure of an increasing population. Whatever be the possible dangers involved in the power of human increase, they have never yet appeared. Whatever may some time be, this never yet has been the evil that has afflicted mankind. Population always tending to overpass the limit of subsistence! How is it, then, that this globe of ours, after all the thousands, and it is now thought millions, of years that man has been upon the earth, is yet so thinly populated? How is it, then, that so many of the hives of human life are now deserted—that once cultivated fields are rank with jungle, and the wild beast licks her cubs where once were busy haunts of men?
It is a fact, that, as we count our increasing millions, we are apt to lose sight of—nevertheless it is a fact—that in what we know of the world’s history decadence of population is as common as increase. Whether the aggregate population of the earth is now greater than at any previous epoch is a speculation which can deal only with guesses. Since Montesquieu, in the early part of the last century, asserted, what was then probably the prevailing impression, that the population of the earth had, since the Christian era, greatly declined, opinion has run the other way. But the tendency of recent investigation and exploration has been to give greater credit to what have been deemed the exaggerated accounts of ancient historians and travelers, and to reveal indications of denser populations and more advanced civilizations than had before been suspected, as well as of a higher antiquity in the human race. And in basing our estimates of population upon the development of trade, the advance of the arts, and the size of cities, we are apt to underrate the density of population which the intensive cultivations, characteristic of the earlier civilizations, are capable of maintaining—especially where irrigation is resorted to. As we may see from the closely cultivated districts of China and Europe a very great population of simple habits can readily exist with very little commerce and a much lower stage of those arts in which modern progress has been most marked, and without that tendency to concentrate in cities which modern populations show.21
Be this as it may, the only continent which we can be sure now contains a larger population than ever before is Europe. But this is not true of all parts of Europe. Certainly Greece, the Mediterranean Islands, and Turkey in Europe, probably Italy, and possibly Spain, have contained larger populations than now, and this may be likewise true of Northwestern and parts of Central and Eastern Europe.
America also has increased in population during the time we know of it; but this increase is not so great as is popularly supposed, some estimates giving to Peru alone at the time of the discovery a greater population than now exists on the whole continent of South America. And all the indications are that previous to the discovery the population of America had been declining. What great nations have run their course, what empires have arisen and fallen in “that new world which is the old,” we can only imagine. But fragments of massive ruins yet attest a grander pre-Incan civilization; amid the tropical forests of Yucatan and Central America are the remains of great cities forgotten ere the Spanish conquest; Mexico, as Cortez found it, showed the superimposition of barbarism upon a higher social development, while through a great part of what is now the United States are scattered mounds which prove a once relatively dense population, and here and there, as in the Lake Superior copper mines, are traces of higher arts than were known to the Indians with whom the whites came in contact.
As to Africa there can be no question. Northern Africa can contain but a fraction of the population that it had in ancient times; the Nile Valley once held an enormously greater population than now, while south of the Sahara there is nothing to show increase within historic times, and widespread depopulation was certainly caused by the slave trade.
As for Asia, which even now contains more than half the human race, though it is not much more than half as densely populated as Europe, there are indications that both India and China once contained larger populations than now, while that great breeding ground of men from which issued swarms that overran both countries and sent great waves of people rolling upon Europe, must have been once far more populous. But the most marked change is in Asia Minor, Syria, Babylonia, Persia, and in short that vast district which yielded to the conquering arms of Alexander. Where were once great cities and teeming populations are now squalid villages and barren wastes.
It is somewhat strange that among all the theories that have been raised, that of a fixed quantity to human life on this earth has not been broached. It would at least better accord with historical facts than that of the constant tendency of population to outrun subsistence. It is clear that population has here ebbed and there flowed; its centers have changed; new nations have arisen and old nations declined; sparsely settled districts have become populous and populous districts have lost their population; but as far back as we can go without abandoning ourselves wholly to inference, there is nothing to show continuous increase, or even clearly to show an aggregate increase from time to time. The advance of the pioneers of peoples has, so far as we can discern, never been into uninhabited lands—their march has always been a battle with some other people previously in possession; behind dim empires vaguer ghosts of empire loom. That the population of the world must have had its small beginnings we confidently infer, for we know that there was a geologic era when human life could not have existed, and we cannot believe that men sprang up all at once, as from the dragon teeth sowed by Cadmus; yet through long vistas, where history, tradition and antiquities shed a light that is lost in faint glimmers, we may discern large populations. And during these long periods the principle of population has not been strong enough fully to settle the world, or even so far as we can clearly see materially to increase its aggregate population. Compared with its capacities to support human life the earth as a whole is yet most sparsely populated.
There is another broad, general fact which cannot fail to strike any one who, thinking of this subject, extends his view beyond modern society. Malthusianism predicates a universal law—that the natural tendency of population is to outrun subsistence. If there be such a law, it must, wherever population has attained a certain density, become as obvious as any of the great natural laws