pay any rent. And land which can pay more than a profit on this working capital, returns that excess as rent, even if the farmer is also the owner and landlord. The principle which regulates the amount of that excess—which is the essential point—is the principle which determines the amount of economic rent, and it holds true in the United States or Finland, provided only that different grades of land are called into cultivation. The governing principle is the same, no matter whether a payment is made to one man as profit and to another as rent, or whether the two payments are made to the same man in two capacities. It has been urged that the law of rent does not hold in the United States, because “the price of grain and other agricultural produce has not risen in proportion to the increase of our numbers, as it ought to have done if Ricardo's theory were true, but has fallen, since 1830, though since that time our population has been more than tripled.”181 This overlooks the fact that we have not even yet taken up all our best agricultural lands, so that for some products the law of diminishing productiveness has not yet shown itself. The reason is, that the extension of our railway system has only of late years brought the really good grain-lands into cultivation. The fact that there has been no rise in agricultural products is due to the enormous extent of marvelously fertile grain-lands in the West, and to the cheapness of transportation from those districts to the seaboard.
For a general understanding of the law of rent the following table will show how, under constant increase of population (represented by four different advances of population, in the [pg 240] first column), first the best and then the poorer lands are brought into cultivation. We will suppose (1) that the most fertile land, A, at first pays no rent; then (2), when