Adam Smith's adaptation of the classical tradition of moral philosophy constitutes an important attempt to shape the language of the virtues to the conditions of commercial society. An overlooked avenue to understanding his enterprise is his analysis of the practice of daily conversation, both as a medium of moral knowledge and as a source of the sorts of virtues possible in commercial society. In his attempt to answer the challenge of egoistic, “licentious” philosophers such as Bernard Mandeville—whose notion of “private vices, public benefits” typified the then-fashionable argument that modern society is held together not by virtues, but by the mutual satisfaction of interests—Smith drew on a combination of natural law theory and Scottish sociology to fashion a conception of moderate virtue that could harmonize prudence and benevolence, as well as the “masculine” virtues of self-command and the “feminine” virtues of humanity, in ways consonant with the character of daily interactions in a modern society.