Who was a congressman from Pennsylvania and one of the radical Republicans who believed in harsh punishments for the south after the Civil War. He wanted to divide the plantations to give land to former slaves

Thaddeus Stevens in the House and Charles Sumner in the Senate

Explanation: I believe that this is the answer but I am not sure

i confess that there are several parts of this constitution which i do not at present approve, but i am not sure i shall never approve them: for having lived long, i have experienced many instances of being obliged by better information or fuller consideration, to change opinions even on important subjects, which i once thought right, but found to be otherwise. it is therefore that the older i grow, the more apt i am to doubt my own judgment, and to pay more respect to the judgment of others.

because he created electricity