I. Haeckel and His Opponents

Goethe followed another road. “That which Linnaeus strove forcibly to hold apart was bound, according to the innermost need of my being, to strive after reunion.” Thus there grew up in him the view which, in 1796, in the Lectures upon the three first chapters of A General Introduction to Comparative Anatomy, he summed up in the sentence: “This, then, we have gained, that we can unhesitatingly maintain that all complete organic natures—among which we see fishes, amphibia, birds, mammals, and, as the head of the last, man—have all been shaped according to one original type, which only inclines more or less to this side or the other in its constant parts, and yet daily develops and transforms itself by reproduction.” The basic type, to which all the manifold plant-forms may be traced back, had already been described by Goethe in 1790 in his Attempt to Explain the Metamorphosis of Plants. This way of regarding things, by which Goethe endeavoured to recognise the laws of living nature, is exactly similar to that which he demands for the inorganic world in his essay, written in 1793, Experiment as Mediator between Object and Subject: “Nothing happens in Nature which is not in some connection with the whole, and if experiences only appear to us as isolated, if we can only regard experiments as isolated facts, that does not imply that they actually are isolated; it is only the question: How shall we find the connection of these phenomena, these occurrences?” Species also appear to us only in isolation. Goethe seeks for their connection. Hence it clearly appears that Goethe's effort was directed to apply the same mode of explanation to the study of living beings as has led to the goal in that of inorganic nature.[^1]