David Brion Davis said this quote

We must face the ultimate contradiction that our free and democratic society was made possible by massive slave labor.

~ David Brion Davis

HIt is surely certain - as certain as one can be about any historical events - that the fall of New World slavery could not have occurred if there had been no abolitionist movements. We can thus end on a positive note of willed achievement, a century’s moral achievement that may have no parallel. It is an achievement, despite its many limitations, that should help inspire some confidence in other movements for social change, for not being condemned to fully accept the world into which we are born.

~ David Brion Davis

The subject of British abolitionism has long been controversial, complex, and even baffling. It also raises the issue of moral progress in history - whether groups of reformers and even nations can succeed in eliminating deeply entrenched forms of human oppression, and if so, by what methods, misconceptions, and under what conditions?

~ David Brion Davis

What matters is that Southern slaves, at least on the larger plantations, created their own African American culture, which helped to preserve some of the more crucial areas of life and thought from white control or domination without significantly reducing the productivity and profitability of slave labor. Living within this African American culture, sustained by strong community ties, many slaves were able to maintain a certain sense of apartness, of pride, and of independent identity.

~ David Brion Davis