The Age of Enlightenment, an intellectual movement in the 17th and 18th centuries advocating rationality, produced a great revival of satire in Britain. This was fuelled by the rise of partisan politics, with the formalisation of the Tory and Whig parties—and also, in 1714, by the formation of the Scriblerus Club, which included Alexander Pope, Jonathan Swift, John Gay, John Arbuthnot, Robert Harley, Thomas Parnell, and Henry St John, 1st Viscount Bolingbroke. This club included several of the notable satirists of early-18th-century Britain. They focused their attention on Martinus Scriblerus, "an invented learned fool... whose work they attributed all that was tedious, narrow-minded, and pedantic in contemporary scholarship". In their hands astute and biting satire of institutions and individuals became a popular weapon. The turn to the 18th century was characterized by a switch from Horatian, soft, pseudo-satire, to biting "juvenal" satire.