It is solely to the latest attempt at giving, a basis to Ethics--I mean the Kantian--that a critical examination will be devoted. I shall make it all the more exhaustive, partly because the great ethical reform of Kant gave to this science a foundation having a real superiority to previous ones and partly because it still remains the last important pronouncement in this domain; for which reason it has obtained general acceptance up to the present day, and is universally taught, although differently garnished by certain changes in the demonstration and in the terminology. It is the ethical system of the last sixty years, which must be removed ere we enter on another path. Furthermore, my criticism of the Kantian basis will give me occasion to examine and discuss most of the fundamental conceptions of Ethics, and the outcome of this investigation I shall later on be able to postulate. Besides, inasmuch as opposites illustrate each other, it is exactly this course which will be the best preparation and guide, indeed the direct way, to my own position, which in its essential points is diametrically opposed to Kant's. It would therefore be a very perverse beginning to skip the following criticism, and turn at once to the positive part of my exposition, which then would remain only half intelligible. In any case the time has assuredly arrived for once to cite Ethics before the bar of a searching scrutiny. During more than half a century it has been lying comfortably on the restful cushion which Kant arranged for it--the cushion of the Categorical Imperative of Practical Reason. In our day this Imperative is mostly introduced to us under a name which, being smoother and less ostentatious, has obtained more currency. It is called "the Moral Law"; and thus entitled, with a passing bow to reason and experience, it slips through unobserved into the house. Once inside, there is no end to its orders and commands; nor can it ever afterwards be brought to account. It was proper, indeed inevitable, that Kant, as the inventor of the thing, should remain satisfied with his creation, particularly as he shelved by its means errors still more glaring. But to be obliged to look on and see asses disporting themselves on the comfortable cushion which he prepared, and which since his time has been more and more trampled on and flattened out--this truly is hard. I allude to the daily hackney compilers, who, with the ready confidence born of stupidity, imagine that they have given a foundation to Ethics, if they do but appeal to that "Moral Law" which Is alleged to be inherent in our reason; and then they complacently weave upon this such a confused and wide-reaching tissue of phrases that they succeed in rendering unintelligible the clearest and simplest relations of life: and all this, without ever once seriously asking themselves whether in point of fact there really does exist such a "Moral Law," as a convenient code of morality, graven in our heads or hearts.