Monsieur de Montalte is a fictional character created by the French philosopher and writer Voltaire. He appears in Voltaire's novel, "Candide," where he serves as a representation of the philosophical ideas of the time, particularly those related to optimism and the critique of society. In the story, Monsieur de Montalte is depicted as a wise and thoughtful figure who engages in discussions about the nature of happiness and the human condition. His character reflects Voltaire's skepticism towards blind optimism, challenging the notion that "all is for the best in the best of all possible worlds."