Page:Progress and poverty - an inquiry into the cause of industrial depressions, and of increase of want with increase of wealth - the remedy (IA progresspovertyi00georiala).pdf/123

Chap. II. 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 wide-spread 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 which 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 to clearly show an aggregate increase