John Stuart Mill (1806-1873) originally wrote the Principles of Political Economy, with some of their Applications to Social Philosophy very quickly, having studied economics under the rigorous tutelage of his father, James, since his youth. It was published in 1848 (London: John W. Parker, West Strand) and was republished with changes and updates a total of seven times in Mill's lifetime.The edition presented here is that prepared by W. J. Ashley in 1909, based on Mill's 7th edition, 1870. Ashley followed the 7th edition with great care, noting changes in the editions in footnotes and in occasional square brackets within the text. The text provides English translations to several lengthy...