This paper examines the role of knowledge elites in modernization. At the eve of the French Revolution, in the spring of 1789, King Louis XVI solicited lists of grievances (Cahiers de Doléances), in which the public could express complaints and suggestions for reforms of the Ancien Regime. We show that the demand for mass education and democratization was particularly high in regions that had a thick knowledge elite, measured by subscribers to the famous Encyclopédie in the 1770s. Historical evidence suggests that this pattern is driven by the spirit of enlightenment of French knowledge elites. Pre-revolution literacy, in contrast, is not correlated with demand for mass education or with the density of knowledge elites. After the French Rev...