Origin of Species Variorum

→ struggle 1859 1860 1861 1866

other hand the struggle 1869 1872

→ balance. 1859 1860 1861 1866 1869

long run, turn the balance. 1872

→ in most cases be 1859 1860 1861 1866

be in most cases 1869 1872

→ having 1859 1860 1861

the males having 1866 1869 1872

→ on the charms of the males; and the slightest 1859 1860 1861

on their charms; and the slighest 1866

charms; and a slight 1869 1872

→ that 1859 1860 1861 1866

to find that 1869 1872

→ the changed conditions of 1859 1860 1861 1866

OMIT 1869 1872

→ there are at least 1859 1860 1861 1866

species present 1869 1872

shall decrease, or finally become extinct. As the

indi- viduals

individuals

of the same species come in all respects into the closest competition with each other, the struggle will generally be most severe between them; it will be almost equally severe between the varieties of the same species, and next in severity between the species of the same genus.

But

the →struggle will often be

~~very~~

very

severe between

being

beings

~~most~~

most

remote in the scale of nature. The slightest advantage in

certain individuals,

one being,

at any age or during any season, over those with which

they

come

comes

into competition, or better adaptation in however slight a degree to the surrounding physical conditions,

will,

will

turn

the →balance.

With animals having separated

sexes,

sexes

there will →in most cases be a struggle between the males for

the possession

possession

of the females. The most vigorous

males,

individuals,

or those which have most successfully struggled with their conditions of life, will generally leave most progeny. But success will often depend on →having special

weapons,

weapons

or means of defence, or →on the charms of the males; and the slightest advantage will lead to victory.

As geology plainly proclaims that each land has undergone great physical changes, we might have expected →that organic beings

~~would~~

would

have varied under nature, in the same way as they

~~generally~~

generally

have varied under →the changed conditions of domestication. And if there

has been

any variability under nature, it would be an unaccountable fact if natural selection

did

had

not come into play. It has often been asserted, but the assertion is

~~quite~~

quite

incapable of proof, that the amount of variation under nature is a strictly limited quantity. Man, though acting on external characters alone and often capriciously, can produce within a short period a great result by adding up mere individual differences in his domestic productions; and every one admits that →there are at least individual

differences.

differences

~~species~~

species

~~under~~

under