Rousseau's ideas were in the air; he only expressed what many of his contemporaries knew, namely that they were faced with a choice and had to decide either for Voltairianism, with its reasonableness and respectability, or for the surrender of historical traditions and a completely new beginning. There is no personal relationship in the whole history of European culture with more profound symbolic significance than that between Voltaire and Rousseau.

Chapter 2. The New Reading Public - The Social History of Art, Volume III. Rococo, Classicism and Romanticism, 1999