Radical Reconstruction ultimately failed because it lacked the sustained political effort needed to make it work. As time went on, most people, North and South, wanted to move on from the war, and yet Radical Reconstruction acted as a constant reminder of that war and the divisions it had sown.
As one would expect, the policy was deeply unpopular in the South, but even in the North, public opinion grew hostile towards the policy for the reasons above. And besides, Northerners, no less than their Southern counterparts, were generally firm believers in racial supremacy and so didn't see why such great efforts needed to be made by the Federal government to ensure equality for African Americans.
As the tide of public opinion turned against Radical Reconstruction, the Republicans found themselves in danger of losing votes in the North. And so the policy was quietly abandoned,...
(The entire section contains 2 answers and 431 words.)