In order to be able to pass an accurate judgement on this new product of the Kantian genius—which is more than a mere reworking of the Groundwork of the Metaphysics of Morals—and on its relation to the doctrines of other philosophers, it is necessary to uncover the main principles on which the author builds, and by means of which he proceeds, and to accompany them individually with comments. In order to make the occasionally necessary reference to them easier, I will number them.