" The Compromise of , though welcomed on all sides as a final settlement, failed as completely as the Missouri Compromise had succeeded. It has already been said that the fault was not in any lack of skill in the actual framing of the plan. As a piece of political workmanship it was even superior to Clay's earlier masterpiece, as the rally to it at the moment of all but the extreme factions, North and South, sufficiently proves. That it did not stand the wear of a few years as well as the earlier settlement had stood the wear of twenty was due to a change in conditions, and to understand that change it is necessary to take up again the history of the Slavery Question where the founders of the Republic left it."