How do the 13th, 14th, and 15th Amendments to the Constitution represent one of the most lasting and successful legacies of the Reconstruction era?

Here is what I found,

The 13th, 14th, and 15th Amendments, known collectively as the Civil War Amendments, were designed to ensure equality for recently emancipated slaves. The 13th Amendment banned slavery and all involuntary servitude, except in the case of punishment for a crime.

25. twelve tables

26. having important positions chosen by lot