Catherine & Diderot

When Empires Collide is a history of the famous encounter between the French philosopher Denis Diderot and his patron, Empress Catherine II of Russia, in 1773. The book begins many years earlier and traces the life of Diderot and Catherine in alternating chapters, painting a vivid and complex portrait of eighteenth-century Europe where new Enlightenment thinking co-existed with old monarchical systems. Robert Zaretsky has written an intellectual and political history of the time by spotlighting the exchange of ideas between a philosopher who reflected on the nature of power and a ruler who excercised it. In the autumn of 1773, taking up residence in Saint Petersburg at Catherine's invitation, the two met every third day for Catherine's instruction in various philosophical and political subjects. Zaretsky describes the scene: "For each 'lesson,' he prepared a series of notes on a particular theme, from which he would read at the start of the session. Having thus introduced the theme, Diderot then engaged Catherine in conversation. This made for a stunning tableau: the conversations were freewheeling, free of the protocol that reigned elsewhere in the palace. Catherine frequently kni