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. In an 1887 letter to an Anglican bishop, he famously wrote, 'Power tends to corrupt, and absolute power corrupts absolutely', underscoring his belief that unchecked power poses the greatest threat to human freedom. His works consistently emphasised the importance of limiting governmental and institutional power in favour of individual rights and personal liberty.
Early life and background
The only son of Sir Ferdinand Dalberg-Acton, 7th Baronet, and grandson of the Neapolitan admiral and prime minister Sir John Acton, 6th Baronet (who succeeded to the baronetcy and estates held by another branch of the Acton family in Shropshire in 1791), Acton was known as Sir John Dalberg-Acton, 8th Baronet, from 1837 to 1869. His grandfather was part of a younger line of the family that had moved to France and Italy, but after the extinction of the elder branch he became the patriarch.
Acton's father, known as Richard, married Marie Louise Pelline, the only daughter 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. His father died in Paris when he was three.
