Who wrote a work that described European history until the dawn of the age of the longest serving monarch in European history?
Essai sur les mœurs et l'esprit des nations: Essai sur les mœurs et l'esprit des nations ("Essay on Universal History, the Manners, and Spirit of Nations") is a work by the French writer, historian, and philosopher Voltaire, published for the first time in 1756. Essai sur les mœurs et l'esprit des nations:  It discusses the history of Europe before Charlemagne until the dawn of the age of Louis XIV, also addressing the colonies and the East.
i don't know