'The Rise of Political Economy as a Science' opens with a review of the epistemological ideas that inspired the classical economists: the methodological principles of Bacon, Descartes, Hobbes, Newton, Locke, Hume, Stewart, Herschel, and Whewell. These principles were influential not just in the development of political economy, but in the rise of social science in general. The author then examines science in eighteenth- and nineteenth-century Britain, with a particular emphasis on the all-important concept of induction. Having laid the necessary groundwork, she proceeds to a history and analysis of the methodologies of four economist-philosophers - Adam Smith, Robert Malthus, David Ricardo, and J. S. Mill - selected for their historical importance as founders of economics and for their common Scottish intellectual lineage. Concluding remarks put classical methodology into a broader historical perspective.