Origin of Species Variorum

→ of the larger 1859 1860 1861 1866

belonging to large and 1869 1872

→ has sometimes been a 1866 1869 1872

may often be a very 1859 1860 1861

→ spreading of the 1859 1860 1861 1866

OMIT 1869

→ of life, which are those that oftenest vary, will in the long run 1859 1860 1861 1866

which spread widely and yield the greatest number of varieties will 1869

→ places of those groups of species 1859 1860 1861 1866

groups 1869

→ all the forms of life, ancient and recent, make together one grand system; for all are connected by generation. 1859 1860 1861 1866

all the forms of life, ancient and recent, make together a few grand classes; for all are at least thus far connected by generation. 1869

dominant forms which spread widely and yield the greatest number of varieties tend to people the world with allied, but modified, descendants; and these will generally succeed in displacing the groups which are their inferiors in the struggle for existence. 1872

↑ 1 blocks not present in 1859 1860 1861 1866 1869; present in 1872

Hence, after long intervals of time, the productions of the world will appear to have changed simultaneously.

→ from 1859 1860 1861 1866 1869

how it is that all the forms of life, ancient and recent, make together a few grand classes. We can understand, from 1872

yet in the long run that all undergo modification to some extent. The extinction of old forms is the almost inevitable consequence of the production of new forms. We can understand why when a species has once disappeared it never reappears. Groups of species increase in numbers slowly, and endure for unequal periods of time; for the process of modification is necessarily slow, and depends on many complex contingencies. The dominant species →of the larger dominant groups tend to leave many modified descendants,

which form

and thus

new sub-groups and

groups.

groups

~~are~~

are

~~formed.~~

formed.

As these are formed, the species of the less vigorous groups, from their inferiority inherited from a common progenitor, tend to become extinct together, and to leave no modified offspring on the face of the earth. But the utter extinction of a whole group of species →has sometimes been a slow process, from the survival of a few descendants, lingering in protected and isolated situations. When a group has once wholly disappeared, it does not reappear; for the link of generation has been broken.

We can understand how the →spreading of the dominant forms →of life, which are those that oftenest vary, will in the long run tend to people the world with allied, but modified, descendants; and these will generally succeed in

displacing

taking

the →places of those groups of species which are their inferiors in the struggle for existence. Hence, after long intervals of time, the productions of the world

~~will~~

will

appear to have changed

simultaneously. &

simultaneously.

We can understand how it is that →all the forms of life, ancient and recent, make together one grand system; for all are connected by generation. ↑ We can

understand

understand,

→from the continued tendency to divergence of character, why the more ancient a form is, the more