This trenchant essay contains fifty-seven pages, of which reasoning
forms the greater part. As to the facts it might well pass for an
essay from Professor Poulton’s pen, for Weismann’s special province
of insects occupies nearly all the evidence from facts. Outside this
highly specialised group there are exactly fifty-three lines, or one
and a half pages, which deal with other animal groups, and there are
four casual allusions to plants occupying twelve lines in all! In the
essay of 1909 on the Selection Theory this treatment of animated life
in the world is improved upon and thirteen out of its forty-seven pages
refer to animals outside his favourite group of insects. Such exclusive
dealing with these little things does not commend the reasoning, at any
rate to a neo-Lamarckian; such a circle is too select for him.
Weismann’s Twelve Points.
The most striking remarks from the 1895 essay on germinal selection
are:--
1. “The real aim of the present essay is to rehabilitate the principle
of selection. If I should succeed in reinstating this principle in its
imperilled rights, it would be a source of extreme satisfaction to
me.”[14]
[14] Preface to _Germinal Selection_, 1895, p. xii.
2. Speaking of the whole theory of selection he claimed to have
found a position “which is necessary to protect it against the many
doubts which gathered around it on all sides like so many lowering
thunder-clouds.”[15] And he speaks on page 26 of “the flood of
objections against the theory of selection touching its inability to
modify many parts at once.”
[15] p. 38.
Thus Weismann stood forth to defend the crumbling edifice of Darwinism
and threw his shining sword into the scales, a scientific Athanasius
“contending for our all.” Again is seen a friend of Darwin from another
camp than that of Mendel, whose support needs to be received with some
caution. _Toujours en vedette_ is a useful rule.
3. Speaking of adaptedness in animated nature he says, “We know of
only one natural principle of explanation for this fact--that of
selection.”[16]
[16] p. 43.
4. “Germinal selection is the last consequence of the application of
the principle of Malthus to living nature.”[17]
[17] p. 43.
5. “Without doubt the theory (Germinal Selection) requires that the
initial steps of a variation should also have selective value.”[18]
[18] p. 38.
6. “Something is still wanting in the theory of Darwin and Wallace
which it is obligatory on us to discover if we possibly can. We must
seek to discover why it happens that useful variations are always
present.”[19]
[19] p. 15.
7. “It is impossible to do without the assumption that the useful
variations are always present, or that _they always exist in
a sufficiently large number of individuals for the selective
process_.”[20]
[20] p. 14.
Public-domain text, read in full here on John Shaqi.
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