Letter to M. D'Alembert on Spectacles (French: Lettre a M. D'Alembert sur les spectacles) is a 1758 essay written by Jean-Jacques Rousseau in opposition to an article published in the Encyclopédie by Jean d'Alembert, that proposed the establishment of a theatre in Geneva. More generally, it is a critical analysis of the effects of culture on morals, that clarifies the links between politics and social life. Rousseau relates the issue of a theatre in Geneva to the broader social context, warning of the potential the theatre has to corrupt the morality in society.
The Letter is considered to be highly personally relevant to Rousseau, whose patriotism and affinity for Geneva shows through as he writes to defend his country from moral decay. By focusing on his belief in the natural order and harmony of traditional sex roles and community, Rousseau writes to convince D'Alembert, and the public of Geneva, that a theatre is a threat to an ideal, natural way of life.
Rousseau generally opposed the Enlightenment thrust that was occurring during his lifetime. He sought to distance himself philosophically from the views that the universal use of reason, science, uninhibited freedom of thought, and increasing appreciation for the fine arts would make society a better place. Rousseau is often characterized as the father of Romanticism, as he opposed modernity and the Enlightenment and glorified the heroic ethos of Ancient Rome and Greece.
The trend of the Enlightenment among philosophers, since Descartes and Spinoza, was to move towards a society with minimized restrictions. Rousseau adhered to the belief that restrictions and censorship are often justified to maintain civil order.Ecclesiastical groups as well, namely the Jansenists, harshly condemned the theatre due to it being incompatible with Christian morality. However, after the death of Louis XIV, new philosophical ideas began to emerge about embracing earthly pleasure, and the theatre found more and more supporters. It may be important to note that the theatre was a far more powerful cultural force in Rousseau's day than today. D'Alembert's article in support of the theatre was influenced by Voltaire, who not only was against censorship, but frequently put on theatrical performances at his home outside of Geneva.