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Updated: May 26, 2025
The only thing to do is to pluck them out root and branch: they are as a cancer which, if the smallest fibre be left unexcised, will grow again, and kill any system on to which it is allowed to fasten. Mr. Wallace, therefore, may well be excused if he casts longing eyes towards Weismannism. And what was Mr. Darwin's system? Who can make head or tail of the inextricable muddle in which he left it?
This last contrast goes deeper even than the one we have already noted, that between the Darwinian and the Lamarckian principle of explanation; and it leads ultimately from the special Darwinian problem to quite a new one, to be solved by itself—the problem of the nature and secret of living matter. Weismannism.
Weismannism not only retained the principle of utility and selection, but made it the only principle, rejecting entirely the action of external conditions as a cause of congenital modifications, i.e. of characters whose development is predetermined in the fertilised ovum.
His chief work is in three volumes, entitled “Die Entstehung der Arten auf Grund von Vererbung erworbener Eigenschaften, nach Gesetzen organischen Wachsens.” It is a polemic against Weismannism in all details, even to the theory of “germinal selection.” Eimer follows in the footsteps of St.
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