The Principles of Political Economy

Preliminary Remarks　In 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.