Is it possible to formulate a valid moral judgment? The answer from Adam Smith

The problem of the rightness of moral judgment is central for ethics. The main point of this article is Adam Smith's answer to this problem. I am going to argue that Smith did not think that moral judgment depends on private sentiments, but on the judgment of the impartial spectator. I will defend that the smithian's answer is beetwen the humean scepticism and the kantian criticism.