Julie Candler Hayes examines major moralist writers such as Madeleine de Scudéry, Anne-Thérèse de Lambert, Émilie Du Châtelet, and Germaine de Staël, as well as nearly two dozen of their contemporaries. Their reflections range from traditional topics such as the nature of the self, friendship, happiness, and old age, to issues that were very much part of their own lifeworld, such as the institution of marriage and women's nature and capabilities. Each chapter traces the evolution of women's moralist thought on a given topic from the late seventeenth century to the Enlightenment and the decades immediately following the French Revolution, a period of tremendous change in the horizon of possibilities for women as public figures and intellectuals. Hayes demonstrates how, through their critique of institutions and practices, their valorization of introspection and self-expression, and their engagement with philosophical issues, women moralists carved out an important space for the public exercise of their reason.