Samuel Johnson (18 September 1709 [O.S. 7 September] – 13 December 1784), often referred to as Dr. Johnson, was an English writer who made lasting contributions to English literature as a poet, essayist, moralist, literary critic, biographer, editor and lexicographer. Johnson was a devout Anglican and committed Tory, and is described by the Oxford Dictionary of National Biography as "arguably the most distinguished man of letters in English history". He is the subject of the most famous biography in English literature, namely The Life of Samuel Johnson by James Boswell.