Why were the radical Republican considered to be radical

The Radical Republican plan for Reconstruction was considered radical because, if it would be enacted, it would bring significant changes to the South. The original goals of their plan called for giving all African-American males the right to vote. This was a huge change for southerners, as African-American males weren’t allowed to vote as slaves. It also called for taking away the voting rights of the former leaders of the Confederacy.