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every department of human affairs, Practice long precedes Science: systematic enquiry into the modes of action of the powers of nature, is the tardy product of a long course of efforts to use those powers for practical ends. The conception, accordingly, of Political Economy as a branch of science is extremely modern; but the subject with which its enquiries are conversant has in all ages necessarily constituted one of the chief practical interests of mankind, and, in some, a most unduly engrossing one.

That subject is Wealth. Writers on Political Economy profess to teach, or to investigate, the nature of Wealth, and the laws of its production and distribution: including, directly or remotely, the operation of all the causes by which the condition of mankind, or of any society of human beings, in respect to this universal object of human desire, is made prosperous or the reverse. Not that any treatise on Political