" 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