John Emerich Edward Dalberg-Acton, 1st Baron Acton, KCVO, DL (10 January 1834 – 19 June 1902), known as Sir John Dalberg-Acton, 8th Bt from 1837 to 1869 and usually referred to simply as Lord Acton, was an English Catholic historian, politician, and writer.
The science of politics is the one science that is deposited by the streams of history, like the grains of gold in the sand of a river; and the knowledge of the past, the record of truths revealed by experience, is eminently practical, as an instrument of action and a power that goes to making the future.
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