John Dalberg-Acton, 1st Baron Acton
The History of Freedom in Antiquity (1877)
John Emerich Edward Dalberg-Acton, 1st Baron Acton, 13th Marquess of Groppoli, , 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 and prime minister Sir John Acton, 6th Baronet. Between 1837 and 1869 he was known as Sir John Dalberg-Acton, 8th Baronet.
He is perhaps best known for the remark, "Power tends to corrupt, and absolute power corrupts absolutely. Great men are almost always bad men...", which he made in a letter to an Anglican bishop. Wikipedia

John Dalberg-Acton, 1st Baron Acton
The History of Freedom in Antiquity (1877)
“A government which cannot be reformed does not merit to be preserved.”
John Dalberg-Acton, 1st Baron Acton
Private notes, quoted in Gertrude Himmelfarb, Lord Acton: A Study in Conscience and Politics (1952), p. 74
Undated
John Dalberg-Acton, 1st Baron Acton
Private notes, quoted in Gertrude Himmelfarb, Lord Acton: A Study in Conscience and Politics (1952), p. 72
Undated
“The strongest of all the obstacles to progress, the reign of the dead.”
John Dalberg-Acton, 1st Baron Acton
Private notes, quoted in G. E. Fasnacht, Acton's Political Philosophy. An Analysis (1952), p. 60, n. 1
Undated
John Dalberg-Acton, 1st Baron Acton
Private notes, quoted in G. E. Fasnacht, Acton's Political Philosophy. An Analysis (1952), p. 19, n. 7
Undated
John Dalberg-Acton, 1st Baron Acton
Letter to William Ewart Gladstone (26 April 1891), quoted in J. N. Figgis and R. V. Laurence (eds.), Selections from the Correspondence of the First Lord Acton, Vol. I (1917), p. 235
“The yeoman farmers of the United States have always been the strength of the republic.”
John Dalberg-Acton, 1st Baron Acton
The North British Review (April 1870), p. 268, quoted in G. E. Fasnacht, Acton's Political Philosophy. An Analysis (1952), p. 217
John Dalberg-Acton, 1st Baron Acton
Private journal (1858), quoted in Gertrude Himmelfarb, Lord Acton: A Study in Conscience and Politics (1952), p. 70
John Dalberg-Acton, 1st Baron Acton
Private journal (1858), quoted in Gertrude Himmelfarb, Lord Acton: A Study in Conscience and Politics (1952), p. 40
John Dalberg-Acton, 1st Baron Acton
Private notes, quoted in Herbert Butterfield, ‘Acton: His Training, Methods and Intellectual System’, in A. O. Sarkissian (ed.), Studies in Diplomatic History and Historiography in honour of G. P. Gooch, C.H. (1961), p. 195
Undated
John Dalberg-Acton, 1st Baron Acton
Private notes, quoted in Herbert Butterfield, ‘Acton: His Training, Methods and Intellectual System’, in A. O. Sarkissian (ed.), Studies in Diplomatic History and Historiography in honour of G. P. Gooch, C.H. (1961), p. 194
Undated
“The only resistance ever made to Louis XIV was from religion.”
John Dalberg-Acton, 1st Baron Acton
Private notes, quoted in Herbert Butterfield, ‘Acton: His Training, Methods and Intellectual System’, in A. O. Sarkissian (ed.), Studies in Diplomatic History and Historiography in honour of G. P. Gooch, C.H. (1961), p. 194
Undated
John Dalberg-Acton, 1st Baron Acton
Private notes, quoted in Herbert Butterfield, ‘Acton: His Training, Methods and Intellectual System’, in A. O. Sarkissian (ed.), Studies in Diplomatic History and Historiography in honour of G. P. Gooch, C.H. (1961), p. 194
Undated
John Dalberg-Acton, 1st Baron Acton
Private notes, quoted in Herbert Butterfield, ‘Acton: His Training, Methods and Intellectual System’, in A. O. Sarkissian (ed.), Studies in Diplomatic History and Historiography in honour of G. P. Gooch, C.H. (1961), p. 192
Undated
John Dalberg-Acton, 1st Baron Acton
Private notes, quoted in Herbert Butterfield, ‘Acton: His Training, Methods and Intellectual System’, in A. O. Sarkissian (ed.), Studies in Diplomatic History and Historiography in honour of G. P. Gooch, C.H. (1961), p. 186
Undated
John Dalberg-Acton, 1st Baron Acton
Letter to William Ewart Gladstone (21 November 1891), quoted in J. N. Figgis and R. V. Laurence (eds.), Selections from the Correspondence of the First Lord Acton, Vol. I (1917), p. 257
1890s
John Dalberg-Acton, 1st Baron Acton
Letter (23 January 1861), published in Lord Acton and his Circle (1906) by Abbot Francis Aidan Gasquet, Letter 74
1860s
John Dalberg-Acton, 1st Baron Acton
1880s, Letter to Mary Gladstone (1881)
John Dalberg-Acton, 1st Baron Acton
1870s, The History of Freedom in Antiquity (1877)
John Dalberg-Acton, 1st Baron Acton
Opening statement.
1870s, The History of Freedom in Antiquity (1877)
John Dalberg-Acton, 1st Baron Acton
Forrás: 1860s, The Massacre Of St. Bartholomew (1869)
John Dalberg-Acton, 1st Baron Acton
Forrás: 1860s, The Massacre Of St. Bartholomew (1869)