This articles collected in this volume explore aspects of Andr Morellet’s productive and representative career in the republic of letters before, during, and after the French Revolution. The topics covered include: his reliance on the principle of order in his writings in many formats and on many subjects; his reflections on culture, society, and politics during his five months among the English in 1772; his conception of economics as a science based on the methods and objectives endorsed by the philosophes ; his use of letters to editors to persuade the literate public to embrace the cause of reason and reform; his public responses to Chateaubriand’s published criticisms of the Enlightenment; and his compilation and modification of his own literary and philosophical works late in life. The collection also includes additions and corrections to the recently published edition of Morellet’s letters to friends, relatives, colleagues, and patrons.