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John Dalberg-Acton, 1st Baron Acton

John Emerich Edward Dalberg-Acton, 1st Baron Acton, 13th Marquess of Groppoli, (10 January 1834 – 19 June 1902), better known as Lord Acton, was an English Catholic historian, politician, and writer. He is best remembered for the remark he wrote in a letter to an Anglican bishop in 1887: "Power tends to corrupt, and absolute power corrupts absolutely." Provided by Wikipedia