It is also very important to observe, that menial servants are absolutely necessary to make the resources of the higher and middle classes of society… - Thomas Robert Malthus

It has been said, and perhaps with truth, that the conclusions of Political Economy partake more of the certainty of the stricter sciences than those of most of the other branches of human knowledge.

But, fortunately for mankind, the neat rents of the land, under a system of private property, can never be diminished by the progress of cultivation.

To estimate the value of Newton's discoveries, or the delight communicated by Shakespeare and Milton, by the price at which their works have sold, would be but a poor measure of the degree in which they have elevated and enchanted their country; nor would it be less grovelling and incongruous to estimate the benefit which the country has derived from the Revolution of 1688, by the pay of the soldiers, and all other payments concerned in effecting it.