How did Jean Le Rond d’Alembert respond to Jean-Jacques Rousseau’s Letter to d’Alembert on the Theatre?

In response to Jean-Jacques Rousseau’s Lettre à d’Alembert sur les spectacles (1758)—which argued that the theatre was a corrupting influence—Jean Le Rond d’Alembert replied with his own work, Lettre à J.-J. Rousseau, citoyen de Genève.1

D’Alembert’s response was described as incisive but not unfriendly. This exchange was sparked by d’Alembert’s article "Genève" for the Encyclopédie, which had suggested that Genevan pastors were moving away from traditional Calvinist orthodoxy and advocated for the establishment of a theatre in the city. Rousseau, who had previously contributed articles on music to the Encyclopédie, took issue with these proposals, leading to his critical letter and d’Alembert’s subsequent rebuttal.12