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 by denying that the progress of agriculture is from better to worse lands.

Now, while it is unquestionably true that the increasing pressure of population which compels a resort to inferior points of production will raise rents, and does raise rents, I do not think that all the deductions commonly made from this principle are valid, nor yet that it fully accounts for the increase of rent as material progress goes on. There are evidently other causes which conspire to raise rent, but which seem to have been wholly or partially hidden by the erroneous views as to the functions of capital and genesis of wages which have been current. To see what these are, and how they operate, let us trace the effect of material progress upon the distribution of wealth.

The changes which constitute or contribute to material progress are three: (1) increase in population; (2) improvements in the arts of production and exchange; and (3) improvements in knowledge, education, government, police, manners, and morals, so far as they increase the power of producing wealth. Material