Thomas Carlyle (4 December 1795 – 5 February 1881) was a Scottish philosopher, satirical writer, essayist, historian and teacher. One of the most important social commentators of his time, he presented many lectures during his lifetime with certain acclaim in the Victorian era. One of those conferences resulted in his famous work On Heroes, Hero-Worship, and The Heroic in History where he explains that the key role in history lies in the actions of the "Great Man", claiming that "History is nothing but the biography of the Great Man". A respected historian in his day, his 1837 book The French Revolution: A History was the inspiration for Dickens' 1859 novel A Tale of Two Cities, and remains popular today. Carlyle's 1836 novel Sartor Resartus is considered one of the finest works of the nineteenth century.