d States,
if emigration be left free to act in this respect for itself, without
legal prohibitions on either side, slave labor will spontaneously go
everywhere in preference to free labor? Is it the fact that the peculiar
domestic institutions of the Southern States possess relatively so much
of vigor that wheresoever an avenue is freely opened to all the world
they will penetrate to the exclusion of those of the Northern States?
Is it the fact that the former enjoy, compared with the latter, such
irresistibly superior vitality, independent of climate, soil, and all
other accidental circumstances, as to be able to produce the supposed
result in spite of the assumed moral and natural obstacles to its
accomplishment and of the more numerous population of the Northern
States?

The argument of those who advocate the enactment of new laws of
restriction and condemn the repeal of old ones in effect avers that
their particular views of government have no self-extending or
self-sustaining power of their own, and will go nowhere unless forced by
act of Congress. And if Congress do but pause for a moment in the policy
of stern coercion; if it venture to try the experiment of leaving men to
judge for themselves what institutions will best suit them; if it be not
strained up to perpetual legislative exertion on this point--if Congress
proceed thus to act in the very spirit of liberty, it is at once charged
with aiming to extend slave labor into all the new Territories of the
United States.

Of course these imputations on the intentions of Congress in this
respect, conceived, as they were, in prejudice and disseminated in
passion, are utterly destitute of any justification in the nature of
things and contrary to all the fundamental doctrines and principles of
civil liberty and self-government.

While, therefore, in general, the people of the Northern States
have never at any time arrogated for the Federal Government the
power to interfere directly with the domestic condition of persons
in the Southern States, but, on the contrary, have disavowed all such
intentions and have shrunk from conspicuous affiliation with those few
who pursue their fanatical objects avowedly through the contemplated
means of revolutionary change of the Government and with acceptance of
the necessary consequences--a civil and servile war--yet many citizens
have suffered themselves to be drawn into one evanescent political issue
of agitation after another