物种起源（英文全本）as和is-全本TXT下载-无广告下载

be a

logical

deduction,

but to my

imagination

it is far

more

satisfactory

to look at

such

instincts

as the

young

cuckoo

ejecting

its

foster-brothers,—ants

making

slaves,—the

larvae of

ichneumonidae

feeding

within the

live

bodies of

caterpillars,—not

as

specially

endowed or

created

instincts,

but as

small con-

sequences

of one

general

law,

leading to

the

advancement

of all

organic

beings,

namely,

multiply,

vary, let

the

strongest

live and

the