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" 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... "
On the Origin of Species by Means of Natural Selection: Or, The Preservation ... - Page 187
by Charles Darwin - 1864 - 440 pages
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A Review of the Systems of Ethics Founded on the Theory of Evolution

Cora May Williams - Ethics, Evolutionary - 1892 - 581 pages
...important as corporeal structures for the welfare of each species, under its present conditions of life. Under changed conditions of life, it is at least possible...accumulating variations of instinct to any extent that was profitable. It is thus, as I believe, that all the most complex and wonderful instincts have originated....
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Contemporary English Ethics

Daniel Rees - Ethics - 1892 - 72 pages
...important as corporeal structures for the welfare of each species, under its present conditions of life. "Under changed conditions of life, it is at least...accumulating variations of instinct to any extent that was profitable." "The instinct of each species is good for itself, but has never so far as we can judge,...
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A Review of the Systems of Ethics: Founded on the Theory of Evolution

Charles Mallory Williams, Cora May Williams - Ethics - 1892 - 581 pages
...important as corporeal structures for the welfare of each species, under its present conditions of life. Under changed conditions of life, it is at least possible...preserving and continually accumulating variations oflnstinct to any extent that was profitable. It is thus, as I believe, that all the most complex and...
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Contemporary English Ethics

Daniel Rees - Ethics - 1892 - 72 pages
...important as corporeal structures for the welfare of each species, under its present conditions of life. "Under changed conditions of life, it is at least...shown that instincts do vary ever so little , then 1 can see no difficulty in natural selection preserving and continually accumulating variations of...
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Nature Versus Natural Selection: An Essay on Organic Evolution

Charles Clement Coe - Evolution - 1895 - 591 pages
...favourable so long as the conditions remain unaltered. This is implied by Mr. Darwin when he says : " Under changed conditions of life it is at least possible...modifications of instinct might be profitable to a species."}: In the next place instincts must vary slightly. "Natura non facit saltunt is applicable to instincts...
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Nature Versus Natural Selection: An Essay on Organic Evolution

Charles Clement Coe - Evolution - 1895 - 591 pages
...favourable so long as the conditions remain unaltered. This is implied by Mr. Darwin when he says : " Under changed conditions of life it is at least possible...modifications of instinct might be profitable to a species."J In the next place instincts must vary slightly. " Natura non facit saltum is applicable...
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Charles Darwin's Works: The origin of species by means of natural selection ...

Charles Darwin - Science - 1896
...important as corporeal structures for the welfare of each species, under its present conditions of life. Under changed conditions of life, it is at least possible...accumulating variations of instinct to any extent that was profitable. It is thus, as I believe, that all the most complex and wonderful instincts have originated....
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The Origin of Species by Means of Natural Selection, Or, The ..., Volume 1

Charles Darwin - Evolution - 1896
...important as corporeal structures for the welfare of each species, under its present conditions of life. Under changed conditions of life, it is' at least...species ; and if it can be shown that instincts do varyever so little, then I can see no difficulty in natural selection preserving and continually accumulating...
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The American Journal of Psychology, Volume 11

Granville Stanley Hall, Edward Bradford Titchener - Psychology - 1900
...of life, it is at least possible that slight modifications of instinct might be profitable for the species; and if it can be shown that instincts do...accumulating variations of instinct to any extent that was profitable. It is thus, as I believe, that all the most complex and wonderful instincts have originated...
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The American Journal of Psychology, Volume 11

Karl M. Dallenbach, Madison Bentley, Edwin Garrigues Boring, Margaret Floy Washburn - Psychology - 1900
...important as corporeal structures for the welfare of the species, under its present conditions of life. Under changed conditions of life, it is at least possible...slight modifications of instinct might be profitable for the species; and if it can be shown that instincts do vary ever so little, then I can see no difficulty...
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