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English: Charles Sumner ( January 6, 1811 – March 11, 1874) was an American politician and statesman from Massachusetts. An academic lawyer but a powerful orator, Sumner was the leader of the antislavery forces in Massachusetts and a leader of the Radical Republicans in the U.S. Senate during the American Civil War and Reconstruction along with Thaddeus Stevens. He jumped from party to party, gaining fame as a Republican. One of the most learned statesmen of the era, he specialized in foreign affairs, working closely with Abraham Lincoln. He devoted his enormous energies to the destruction of what he considered the Slave Power, that is the conspiracy of slave owners to seize control of the federal government and block the progress of liberty. His severe beating in 1856 by South Carolina Representative Preston Brooks on the floor of the United States Senate helped escalate the tensions that led to war. After years of therapy Sumner returned to the Senate to help lead the Civil War. Sumner, who specialized in foreign affairs, was a leading exponent of abolishing slavery to weaken the Confederacy. Although he kept on good terms with Abraham Lincoln, he was a leader of the hard-line Radical Republicans.