A friend, correspondent and intellectual successor to David Ricardo, John Ramsay McCulloch (1789-1864) forged his reputation in the emerging field of political economy by publishing deeply researched articles in Scottish periodicals and the Encyclopaedia Britannica. From 1828 he spent nearly a decade as professor of political economy at the newly founded University of London, thereafter becoming comptroller of the Stationery Office. Perhaps the first professional economist, McCulloch had become internationally renowned by the middle of the century, recognised for sharing his ideas through lucid lecturing and writing. First published in 1825, this textbook was an expanded version of an article originally written in 1822 for the Encyclopaedia Britannica. Reissued here is the 1830 enlarged second edition. In Britain and America the work reached many students, and was translated into multiple European languages. Several other works written or edited by McCulloch are also reissued in the Cambridge Library Collection.