Ideology, social science and general facts in late eighteenth-century French political thought

Jean-Jacques Rousseau's attack on the natural jurisprudence of Grotius, Hobbes and Pufendorf is well known. But what happened to modern natural jurisprudence after Rousseau not very well known. The aim of this article is to try to show how and why it turned into what Emmanuel-Joseph Sieyès called “social science” and the bearing that this Rousseau-inspired transformation has on making sense of ideology, or the moral and political thought of the late eighteenth-century French ideologues.