But a naive reader may say, "Where has Herr Duehring expressly stated that the content of his philosophy of reality is final truth of the last instance?" Well, for example, in his dithyramb on his system which we quoted above, and again where he says "Moral truths as far as they are known are as sound as those of mathematics." Does not Herr Duehring explain that by reason of his powers of criticism and searching investigations, the fundamental philosophy has been brought to light and that he has thus bestowed upon us final truths of last instance? But if Herr Duehring does not set up such a claim either on his own behalf or that of his time, if he says that some time in the misty future final truths of last instance will be established, and that therefore his own statements are merely accidental and confused, a kind of "mole-like scepticism" and "barren confusion," what is all the fuss about, and what useful purpose is served by Herr Duehring? If we gain no ground in the matter of truth and error we gain less in respect of good and evil. Here we have an antagonism of ethical significance, and ethics is a department of human history in which final truths are but slight and few. From people to people, from age to age, there have been such changes in the ideas of good and evil that these concepts are contradictory in different periods and among different peoples. But some one may remark, "Good is still not evil and evil is not good; if good and evil are confused all morality is abolished, and each may do what he will." When the rhetoric is stripped away this is the opinion of Herr Duehring. But the matter is not to be disposed of so easily. If things were as easy as that there would be no dispute about good and evil. Everybody would know what was good and what was evil. How is it to-day, however? What system of ethics is preached to us to-day? There is first the Christian-feudal, a survival of the early days of faith, which is as a matter of fact subdivided into Catholic and Protestant, of which there are still further subdivisions, from the Jesuit-Catholic and orthodox Protestant to loosely drawn ethical systems. There figure also the modern or bourgeois, and still further the proletarian future system of morality, so that the progressive European countries alone present three contemporaneous and coexistent actual theories of ethics. Which is the true one? No single one of them, regarded as a finality, but that system assuredly possesses the most elements of truth which promises the longest duration, which existent in the present is also involved in the revolution of the future, the proletarian.