 Under changed conditions of life, it is at least possible that slight modifications of instinct might be profitable to a species ; and if it can be shown that instincts do vary ever so little, then I can see no difficulty in natural selection preserving...  The Darwinian Theory of the Transmutation of Species - Page 70by Robert Mackenzie Beverley - 1867 - 386 pagesFull view - About this book
 | Hans Siggaard Jensen, Lykke Margot Richter, Morten Thanning Vendel_ - Technology & Engineering - 2003 - 242 pages
...might be profitable to a species; and if it can be shown that instincts do vary ever so little, then I can see no difficulty in natural selection preserving...accumulating variations of instinct to any extent that may be profitable. (Darwin [1859] 1985, p. 236) The second difficulty relates to the ontological conflation... | |
 | Sir Norman Lockyer - Electronic journals - 1882 - 720 pages
...might be profitable to a species ; and if it can be shown that instincts do vary ever so little, then I can see no difficulty in natural selection preserving...complex and wonderful instincts have originated." Briefly, then, in Mr. Darwin's view instincts may arise by lapsing intelligence, by natural selection... | |
 | Natural history - 1898 - 476 pages
...problem of Instinct, Darwin wrote, "If it can be shown that instincts do vary ever so little, then I can see no difficulty in natural selection preserving...variations of instinct to any extent that was profitable." This sentence might well serve as the text for the charming book before us, and seems to have been... | |
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