Vindiciae Gallicae was James Mackintosh's first major publication, a contribution to the debate begun by Edmund Burke's Reflections on the Revolution in France (published by Liberty Fund in 1999). The success of Mackintosh's defense of the French Revolution propelled him into the heart of London Whig circles. The turn of events in France following the September 1792 Massacres caused Mackintosh, along with other moderate Whigs, to revise his opinions and to move closer to Burke's position. A Discourse on the Law of Nature and Nations was the introduction to a popular course of public lectures at Lincoln's Inn in 1799 and 1800. These lectures provided Mackintosh with an opportunity to complete the evolution of his political thought by expounding the principles of a Scottish version of the science of natural jurisprudence dealing with ?the rights and duties of men and of states, to announce his withdrawal of support for the French Revolution, and to criticize former allies on the radical wing of the reform movement. The Liberty Fund edition also includes Mackintosh's Letter to William Pitt, an attack on the prime minister, Pitt the Younger, for going back on his own record as a parliamentary reformer; and On the State of France in 1815, his reflections on the nature and causes of the French Revolution. James Mackintosh (1765?1832) was a prominent Scottish Whig politician, a moral philosopher, and a historian of England. He belonged to the group of students that surrounded Dugald Stewart, professor of moral philosophy in Edinburgh, during the last decades of the eighteenth century and the first decade of the nineteenth century. He was a regular writer for the publishing enterprises this group founded and edited, notably the Edinburgh Review and the Encyclopaedia Britannica; he contributed to the latter his ?Dissertation on the Progress of Ethical Philosophy, Chiefly During the Seventeenth and Eighteenth Centuries, thereby completing a project begun by Dugald Stewart. Donald Winch is Research Professor in the School of Humanities at the University of Sussex and a Fellow of the British Academy. Knud Haakonssen is Professor of Intellectual History and Director of the Centre for Intellectual History at the University of Sussex, England.