In 1718, Saint-Pierre published Discours sur la polysynodie,[1] where he proposed that appointed ministers be replaced by elected councils.

He had a great influence on Rousseau, who left elaborate examinations of some of them, and was a forerunner of Kant's 1795 essay on perpetual peace.

[3] His Projet de paix perpétuelle was published in 1713 in Utrecht, where he was acting as secretary to the French plenipotentiary, the Abbé de Polignac, and his Polysynodie contained severe strictures on the government of Louis XIV, with projects for the administration of France by a system of councils for each department of government.

His works include a number of memorials and projects for stopping duelling, equalizing taxation, treating mendicancy, reforming education and spelling, etc.

It was not, however, for his suggestions for the reform of the constitution that he was disgraced, but because in the Polysynodie he had refused to Louis XIV the title of le Grand.