We here call attention to the attempt to force a sort of moral dogmatism upon us as eternal, final, immutable moral law, upon the pretext that the moral law is possessed of fixed principles which transcend history and the variations of individual peoples. We state, on the contrary, that up to the present time all ethical theory is in the last instance a testimony to the existence of certain economic conditions prevailing in any community at any particular time. And in proportion as society developed class-antagonisms, morality became a class morality and either justified the interests and domination of the ruling class, or as soon as a subject class became strong enough justified revolt against the domination of the ruling class and the interests of the subject class. That, by this means, there is an advance made in morals as a whole, just as there is in all other branches of human knowledge, there can be no doubt. But we have not yet advanced beyond class morals. Real human morality superior to class morality and its traditions will not be possible until a stage in human history has been reached in which class antagonisms have not only been overcome but have been forgotten as regards the conduct of life. Now the colossal egotism of Herr Duehring may be understood when it is seen that, on the eve of a revolution which will bring about a state of society devoid of classes, he claims from the midst of an old and class divided society to proclaim an eternal system of morals independent of time and material change. He himself declares what up to the present has been hid from the rest of us that he understands the structure of this future society at least as regards its salient features. In conclusion he makes a revelation which is essentially original but none the less "fundamental respecting the origin of evil." We have the fact that the type of the cat with its inherent treachery is pictured as the representative animal type, and this also displays a form of character to be found also in man. There is no mystery then about evil if one can detect a mysticism in the cat or any other beast of prey. Evil is--the cat. Goethe was evidently wrong when he introduced Mephistopheles as a black dog instead of a cat similarly colored. This is ethics suited not only to all worlds but to cats also. _Equality._ By dint of experience we have come to learn Herr Duehring's "method." It consists in separating each department of knowledge into what are assumed to be its most simple elements, then of making so called self evident axioms with regard to these simple elements, and thereupon operating with the results obtained in this way. Thus a sociological question is to be "decided on simple axiomatic principles just as if it were a matter of elementary mathematics." Thus the application of the mathematical method to history, ethics and law gives mathematical certainty to the final results which appear as pure and immutable truths.