What was the biggest success of reconstruction and why?

The biggest success of Reconstruction was the passage of the 13th, 14th, and 15th Amendments, which abolished slavery, granted citizenship rights, and ensured voting rights for African American men, respectively. These amendments laid the legal foundation for civil rights and aimed to integrate formerly enslaved people into American society as equal citizens. Despite significant resistance and the eventual rollback of many gains, these constitutional changes represented a transformative shift in American law and society, promoting the ideals of equality and justice.