Voltaire notes that where Commerce and Toleration predominate, a Multiplicity of Faiths can live together in Peace and Happiness (1764)
In his Philosophical Dictionary, Voltaire makes a connection between economic prosperity and religious toleration in England:
Religion & Toleration
Enter into the Royal Exchange of London, a place more respectable than many courts, in which deputies from all nations assemble for the advantage of mankind. There the Jew, the Mahometan, and the Christian bargain with one another as if they were of the same religion, and bestow the name of infidel on bankrupts only… Was there in London but one religion, despotism might be apprehended; if two only, they would seek to cut each other’s throats; but as there are at least thirty, they live together in peace and happiness.