On the other hand the "system-shaping" Herr Duehring is by no means an exceptional phenomenon in Germany these days. Nowadays in Germany systems of cosmogony, of natural philosophy in particular, of politics, of economics, etc., are in the habit of shooting up over night like mushrooms. The most insignificant Doctor of Philosophy, nay, even the student, has no further use for a complete "system." In the modern state, it is predicated that every citizen is able to pass judgment on all the questions upon which he is called upon to vote; in political economy it is assumed that every consumer is thoroughly acquainted with all commodities, which he has occasion to buy to maintain himself withal, and the same idea is also held as regards knowledge. Freedom of knowledge demands that a person write of that which he has not learned and proclaim this as the only sound scientific method. But Herr Duehring is one of the most conspicuous types of those absurd pseudo-scientists, who to-day occupy so conspicuous a place in Germany and drown everything with their noisy nonsense. Noisy nonsense in poetry, in philosophy, in political economy, in writing history: noisy nonsense in the professor's chair and tribune; noisy nonsense too in the claims to superiority and intellectuality above the vulgar noisy nonsense of other nations, noisy nonsense the most characteristic and mightiest product of German intellectual activity, cheap and bad, like other German products, along with which, I regret to say, they were not exhibited at Philadelphia. So, German socialism, particularly since Herr Duehring set the example, beats the drum, and produces here and there one who prides himself upon a "science" of which he knows nothing. It is this, a sort of child's disease which marks the first conversion of the German university man to social democracy and is inseparable from him, but it will soon be thrust aside by the remarkable sound sense of our working class. It is not my fault that I am obliged to follow Herr Duehring into a realm in which I can at the very most only claim to be a dilettante. On such occasions I have for the most part limited myself to placing the plain incontrovertible facts in contrast with the false or crooked assertions of my opponent, as in relation to jurisprudence and many instances with regard to natural science. In other places he indulges in universal views on the subject of natural science theories and therefore on a field where the professional naturalist must range out of his own particular specialty to neighboring regions, where he, according to Herr Virchow's confessions is just as good a "half-knower" as the rest of us. For slight deficiencies and unavoidable errors in the publication I hope that the same indulgence will be extended to me as has been shown the other side of the controversy.