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, Liberal politician, and writer. A strong advocate for individual liberty, Acton is best known for his observation on the dangers of concentrated authority.