Reconstruction: A Success or Failure?

As we all know, the essential idea of Reconstruction was to bring the nation back together and to transform the south. Eventually it did bring the nation back together and it transformed the south to a certain extent. The south was transformed in that there were rights given to African Americans, such as emancipation and the right to vote, through the 13th, 14th, and 15th amendments. However I said the south was transformed "to a certain extent" because the rights given to the African Americans harped on and strengthened a reoccurring issue. Racism. As a result of the added amendments, anti-African American groups formed, such as the KKK and the White League. I'm still confused whether to consider Reconstruction as a success or failure. It had its positive aspects and negative aspects.