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:  It discusses the history of Europe before Charlemagne until the dawn of the age of Louis XIV, also addressing the colonies and the East. Louis XIV of France:  His reign of 72 years and 110 days is the longest recorded of any monarch of a sovereign country in European history.
i don't know