<Tr> <Th> Occupation </Th> <Td> Historian, politician </Td> </Tr> <P> John Emerich Edward Dalberg - Acton, 1st Baron Acton, KCVO DL (10 January 1834--19 June 1902) was an English Catholic historian, politician, and writer . He was the only son of Sir Ferdinand Dalberg - Acton, 7th Baronet and a grandson of the Neapolitan admiral Sir John Acton, 6th Baronet . From 1837 to 1869 he was known as Sir John Dalberg - Acton, 8th Baronet . </P> <P> He is perhaps best known for the remark in a letter to an Anglican bishop, "Power tends to corrupt, and absolute power corrupts absolutely . Great men are almost always bad men, ..." This idea has been tested in laboratory settings . </P> <P> Acton's grandfather, who in 1791 succeeded to the baronetcy and family estates in Shropshire, previously held by the English branch of the Acton family, represented a younger branch which had transferred itself first to France and then to Italy . However, by the extinction of the elder branch, the admiral became head of the family . His eldest son, Richard, married Marie Louise Pelline, the only daughter and heiress of Emmerich Joseph, 1st Duc de Dalberg, a naturalised French noble of ancient German lineage who had entered the French service under Napoleon and represented Louis XVIII at the Congress of Vienna in 1814 . After Sir Richard Acton's death in 1837, she became the wife of the 2nd Earl Granville (1840). Marie Louise Pelline de Dalberg was heiress of Herrnsheim in Germany . She became the mother of John Dalberg - Acton who was born in Naples . </P>

Who said the quote power corrupts absolute power corrupts absolutely
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