I cannot see this. To me it seems still more preposterous to account for
it by the action of “natural selection” operating upon indefinite
variations. It would be preposterous to suppose that a bird very
different from a woodpecker should have had a conception of a woodpecker,
and so by volition gradually grown towards it. So in like manner with
the misletoe. Neither plant nor bird knew how far they were going, or
saw more than a very little ahead as to the means of remedying this or
that with which they were dissatisfied, or of getting this or that which
they desired; but given perceptions at all, and thus a sense of needs and
of the gratification of those needs, and thus hope and fear, and a sense
of content and discontent—given also the lowest power of gratifying those
needs—given also that some individuals have these powers in a higher
degree than others—given also continued personality and memory over a
vast extent of time—and the whole phenomena of species and genera resolve
themselves into an illustration of the old proverb, that what is one
man’s meat is another man’s poison. Life in its lowest form under the
above conditions—and we cannot conceive of life at all without them—would
be bound to vary, and to result after not so very many millions of years
in the infinite forms and instincts which we see around us.
CHAPTER XIII.
LAMARCK AND MR. DARWIN.
IT will have been seen that in the preceding pages the theory of
evolution, as originally propounded by Lamarck, has been more than once
supported, as against the later theory concerning it put forward by Mr.
Darwin, and now generally accepted.
It is not possible for me, within the limits at my command, to do
anything like justice to the arguments that may be brought forward in
favour of either of these two theories. Mr. Darwin’s books are at the
command of every one; and so much has been discovered since Lamarck’s
day, that if he were living now, he would probably state his case very
differently; I shall therefore content myself with a few brief remarks,
which will hardly, however, aspire to the dignity of argument.
According to Mr. Darwin, differentiations of structure and instinct have
mainly come about through the accumulation of small, fortuitous
variations without intelligence or desire upon the part of the creature
varying; modification, however, through desire and sense of need, is not
denied entirely, inasmuch as considerable effect is ascribed by Mr.
Darwin to use and disuse, which involves, as has been already said, the
modification of a structure in accordance with the wishes of its
possessor.
According to Lamarck, genera and species have been evolved, in the main,
by exactly the same process as that by which human inventions and
civilisations are now progressing; and this involves that intelligence,
ingenuity, heroism, and all the elements of romance, should have had the
main share in the development of every herb and living creature around
us.
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