...state the doctrine of natural selection more briefly or more clearly than in Darwin's own words : " As many more individuals of each species are born...to itself, under the complex and sometimes varying 1 Principles of BMogy, § 161. * Hid., § 162. VOL. I. K conditions of life, will have a better chance...

...legbones in the domestic duck. Now, Darwin distinctly states, " Any heing if it vary honeter tlightly in any manner profitable to itself under the complex and sometimes varying conditions of existence will have a better chance of surviving and will thus be naturally selected." This, as italicised,...

...you know, almost simultaneously by Darwin and Mr Wallace. Let me give it you in Darwin's words : " As many more individuals of each species are born...follows that any being, if it vary, however slightly, in a manner profitable to itself under the complex conditions of life, will have a better chance of surviving,...

...is effected, just means the preservation of the most useful modifications of structure or habit. " Any being, if it vary, however slightly, in any manner profitable to itself" says Darwin, "will have a better chance of surviving, and thus be naturally selected." Or, in other...

...be considered. This is the doctrine of Malthus, applied to the whole animal and vegetable kingdoms. As many more individuals of each species are born...as, consequently, there is a frequently recurring straggle for existence, it follows that any being, if it vary however slightly in any manner profitable...

...extension of the human analogy in the large part which " utility " has played in the Darwinian theory. "Any being, if it vary, however slightly, in any manner profitable to itself, will have a better chance of surviving, and thus be naturally selected." Every structure either now...

...arithmetical ratio.2 It was this principle which Darwin applied to the animal and vegetable kingdoms. "As many more individuals of each species are born...survive, and as consequently there is a frequently occurring struggle for existence, it follows that any being, if it vary however slightly in any manner...

...the development of peoples, of institutions, and of types of civilization in the slow, long-sustained rivalry in which they are matched against one another...recurring struggle for existence, it follows that аду being, if it vary, however slightly, in any manner profitable to itself, under the complex and...

...development is effected, just means the preservation of the most .useful modifications of structure or habit. "Any being, if it vary, however slightly, in any manner profitable to itself" says Darwin, "will have a better chance of surviving, and thus be naturally selected." Or, in other...

...the animal and the vegetable kingdoms. In his introduction to The Origin of Species he writes : — " As many more individuals of each species are born...being, if it vary, however slightly, in any manner proStable to itself, under the complex and sometimes varying conditions of life, will have a better...