Louis-Sébastien Mercier was a French writer and thinker of the late eighteenth century, best known for his sharp observations of society and his forward-looking ideas. He gained lasting recognition with his utopian work L’An 2440, rêve s’il en fut jamais (1771), in which he depicts a future Paris that has been morally, socially, and politically reformed. This book is considered one of the earliest examples of futuristic fiction in European literature.