Jean-Jacques Rousseau, in his treatise on the influence of the arts and sciences on morals, established evidence that they corrupted morals and caused human misery, claiming that luxury and civilization were their results, saying by returning to the state of nature, and among what he argued in this treatise was that virtue, honesty, and honesty have no effect in anything other than a natural state, where there are no sciences or arts.
In his letter, Rousseau is considered like a lawyer who sticks to one side in a pleading, so it is difficult to believe that he is serious about playing his role. Therefore, the importance of his message does not appear in its inclusion of a positive doctrine, but rather in its being a key to Rousseau's mental development, and in its being a stage leading to the "origin of inequality," and thus to the "social contract."