...in his introduction uses the term selection by nature, as equivalent to a less ambitious hypothesis. 'As many more individuals of each species are born than can possibly survive, and as consequently there is a frequently-recurring struggle for existence, it follows that any being,...

...clear. Perhaps, indeed, it is impossible to present a muddled idea in transparent language : — " As many more individuals of each species are born than can possibly survive, and as, consequently, there is a frequently recurring struggle for existence, it follows that any being,...

...be treated of. This is the doctrine of Malthus, applied to the whole animal and vegetable kingdoms. As many more individuals of each species are born than can possibly survive ; and as, consequently, there is a frequently recurring struggle for existence, it follows that any...

...be treated of. This is the doctrine of Malthus, applied to the whole animal and vegetable kingdoms. As many more individuals of each species are born than can possibly survive ; and as, consequently, there is a frequently recurring struggle for existence, it follows that any...

...Population, when unchecked, increases in a geometrical ratio. Subsistence increases only in an arithmetical ratio. A slight acquaintance with numbers will show...immensity of the first power in comparison of the second.' * The author subsequently says : — ' Taking the population of the world at any number, a thousand...

...be treated of. This is the doctrine of Maltlms applied to the whole animal and vegetable kingdoms. As many more individuals of each species are born than can possibly survive ; and as consequently there is a frequently recurring struggle for existence, it follows that any being,...

...preservation of favorable variations and the rejection of injurious variations, I call natural selection. ... As many more individuals of each species are born than can possibly survive; and, as consequently, it follows that any being, if it vary however slightly in a manner profitable...

...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 than can possibly survive, and as, consequently, there is a frequently recurring struggle for existence, it follows that any being,...

...Population, when unchecked, increases in a geometrical ratio ; subsistence only in an arithmetical. " A slight acquaintance with numbers will show the immensity of the first power in comparison with the second."1 "The race of plants and animals shrinks under this great restrictive law, and the...

...Population, when unchecked, increases in a geometrical ratio; subsistence only in an arithmetical. "A slight acquaintance with numbers will show the immensity of the first power in comparison with the second." i " The race of plants and animals shrinks under this great restrictive law, and...