Voltaire 
Candide 

Candide, ou l'Optimisme (1759) is a French satire by the Enlightenment philosopher Voltaire, English translations of which have been titled Candide: Or, All for the Best (1759); Candide: Or, The Optimist (1762); and Candide: Or, Optimism (1947). The novella begins with a young man, Candide, who is living a sheltered life in an Edenic paradise and being indoctrinated with Leibnizian optimism (or simply optimism) by his tutor, Pangloss. The work describes the abrupt cessation of this existence, followed by Candide's slow, painful disillusionment as he witnesses and experiences great hardships in the world. Voltaire concludes with Candide, if not outright rejecting optimism, advocating an enigmatic precept, "we must cultivate our garden", in lieu of the Leibnizian mantra of Pangloss, "all is for the best in the best of all possible worlds".