“The struggle for existence, and the selection that goes with it, restricts the appearance of new forms, and is in no way favourable to the production of these forms. It is an inimical factor in evolution.”
(Korchinsky.)
“On the question of knowing whether Natural Selection can engender new specific forms, it seems clear to-day that it cannot.”
(Delage.)
“One could possibly imagine a gradual development of the adaptation between one muscle cell and one nerve-ending, through selection among an infinity of chance-made variations: but that such shall take place coincidentally in time and character in hundreds or thousands of cases in one organism is inconceivable.”
(Wolff, Beitrage zur Kritik der Darwinischen Lehre.)
“The Darwinian theory, favourably received till of late, has lost ground more and more, and may now be said to have failed.”
(Rosa, Professor of University of Padua, Lamarckismo, etc. Bulletin of the Italian Entomological Society, 1910.)
“In conclusion, we may say that the Darwinian theory has completely failed.”
(Carazzi, writing in 1919. See also his speech at Florence in November of the same year.)