neighboring French and Spanish colonies, negro slavery was in 1750 lawful,
and appeared to flourish. Many attempts had been made by colonial
legislatures to cut off or to tax the importation of slaves. Sometimes
they feared the growing number of negroes, sometimes they desired more
revenue. The legislators do not appear to have been moved by moral
objections to slavery. Nevertheless, there was a striking difference
between the sections with regard to slavery. In all the colonies north of
Maryland the winters were so cold as to interfere with farming, and some
different winter work had to be provided. For such variations of labor,
slaves are not well fitted; hence there were but two regions in the North
where slaves were profitably employed as field-hands,--on Narragansett Bay
and on the Hudson: elsewhere the negroes were house or body servants, and
slaves were rather an evidence of the master's consequence than of their
value in agriculture. In the South, where land could be worked during a
larger portion of the year, and where the conditions of life were easier,
slavery was profitable, and the large plantations could not be kept up
without fresh importations. Hence, if any force could be brought to bear
against negro slavery it would easily affect the North, and would be
resisted by the South; in the middle colonies the struggle might be long;
but even there slavery was not of sufficient value to make it permanent.

[Sidenote: Anti-slavery agitation.]

Such a force was found in a moral agitation already under way in 1750. The
Puritans and the Quakers both upheld principles which, if carried to their
legitimate consequences, would do away with slavery. The share which all
men had in Christ's saving grace was to render them brethren hereafter;
and who should dare to subject one to another in this earthly life? The
voice of Roger Williams was raised in 1637 to ask whether, after "a due
time of trayning to labour and restraint, they ought not to be set free?"