The case is very different, however, if we turn from these atomistic
element hypotheses and direct our attention to the historical conditions
of the evolution of the world, as these have been revealed to us by the
magnificent advances in our knowledge of nature which have been made
within the last thirty years. An immense new territory has here been
opened up to us in the realms of knowledge--a territory in which a series
of most important problems, formerly held to be insoluble, has been
answered in the most surprising manner.[12]

Among the triumphs of the human mind the modern doctrine of evolution
takes a foremost place. Guessed at by Goethe a hundred years ago, but not
expressed in definite form until formulated by Lamarck in the beginning
of the present century, it was at last, thirty years ago, decisively
established by Charles Darwin, his theory of selection filling up the gap
which Lamarck in his doctrine of the reciprocal influence of heredity and
adaptation had left open. We now definitely know that the organic world
on our earth has been as continuously developed, "in accordance with
eternal iron laws," as Lyell had in 1830 shown to be the case for the
inorganic frame of the earth itself; we know that the innumerable
varieties of animals and plants which during the course of millions of
years have peopled our planet are all simply branches of one single
genealogical tree; we know that the human race itself forms only one of
the newest, highest, and most perfect offshoots from the race of the
Vertebrates.

An unbroken series of natural events, following an orderly course of
evolution according to fixed laws, now leads the reflecting human spirit
through long aeons from a primeval chaos to the present "order of the
cosmos." At the outset there is nothing in infinite space but mobile
elastic ether, and innumerable similar separate particles--the primitive