But much confusion has been wrought, by men of undisputed authority in their own field, pronouncing positive verdicts in departments where their opinions had no value. What a great composer has to say about the value of a certain note must be respectfully considered as being of importance, but, unless he has studied geology, his opinions on the probable origin or age of the Rocky Mountains will have no more value, and may have less than those of the policeman on the nearest corner. An excellent example of the confusion which may arise in this way, was given to the world in 1877, at the Congress of Naturalists held at Munich in September of that year. At that time the naturalists of Europe were divided into two opposing camps, one accepting and the other rejecting the Darwinian theory of “natural selection.” The leaders of both divisions were Germans, though a preponderance of the Germans favored Darwin, whilst the French, still under the influence of, or agreeing with, Flourens, although he had been dead a decade, were almost unanimously opposed. The honors of leading the fight for Darwinism, at the Munich Congress, fell to Haeckel, and on the 18th of September he threw down the gage in a brilliant address in which he defended the ideas of the great Englishman. Haeckel also advocated the teaching of evolution in the schools. The battle raged back and forth between the two armies, until Virchow, the great pathologist, dropped a bombshell in the Congress by boldly asserting: “Darwinism leads directly to Socialism.” Here biological arguments ceased. The only thing in order was to clear the skirts of Darwinism of the terrible charge of being socialistic. Of course this task fell to Haeckel, and he was loyally assisted by Oscar Schmidt. Writing in “Ausland” two months later Schmidt said: “If the Socialists were prudent they would do their utmost to kill by silent neglect, the theory of descent, for that theory most emphatically proclaims that the Socialist ideas are impracticable.” Haeckel replied to Virchow at some length, and as that reply is rather difficult to obtain I will give it here in full as quoted by Ferri, and translated by Robert Rives La Monte: “As a matter of fact, there is no scientific doctrine which proclaims more openly than the theory of descent, that the equality of individuals, toward which Socialism tends, is an impossibility, that this chimerical equality is in absolute contradiction with the necessary and, in fact, universal inequality of individuals. “Socialism demands for all citizens equal rights, equal duties, equal possessions and equal enjoyments; the theory of descent establishes, on the contrary, that the realization of these hopes is purely and simply impossible; that in human societies, as in animal societies, neither the rights, nor the duties, nor the possessions, nor the enjoyments of all the members of a society are or ever can be equal.