I. Haeckel and His Opponents

From out of this feeling there arises the most important question that man can ask himself: how is his own becoming and being linked with that of the whole world? Schiller, in a letter to Goethe of 23rd August, 1794, admirably characterises the road by which Goethe sought to come to a knowledge of human nature. “From the simple organism you ascend step by step to the more complex, in order finally to build up the most complex of all, man, genetically from the materials of the entire structure of nature.” Now this road of Goethe's is also that which natural science has been following for the last forty years, in order to solve “the question of questions for humanity.” Huxley sees the problem to be the determination of the position which “man occupies in nature, and his relation to the totality of things.” It is the great merit of Charles Darwin to have created a new scientific basis for reflection upon this question. The facts which he brought forward in 1859 in his work, The Origin of Species, and the principles which he there developed, gave to natural research the possibility of showing, in its own way, how well founded was Goethe's conviction that Nature, “after a thousand animal types, forms a being that contains them all—man.”