The views of thirteenth century Catholic thinker Thomas Aquinas and twentieth century economist Milton Friedman on the social responsibility of business are contrasted by probing the foundations of their positions. The basis of Aquinas' normative stance in political economy is found in the metaphysical and moral realism of the classic tradition. The role Descartes and Hobbes played in overturning this philosophical starting point and ushering in an age of ideology is traced out. Friedman's commitment to Comte's vision of positivism is (...) revealed and what this entails for metaphysics, ethics, and economics is given. (shrink)