Zweig traces Fouché's career, beginning with his stint as a math and physics teacher in provincial Catholic schools and evolving into a moderate and then radical legislator. Fouché cultivated every political movement du jour, holding no convictions of his own. After preaching clemency for Louis XVI, Fouché voted to send the King to the guillotine. After writing "the first communist manifesto of modern times" he became a multi-millionaire. He led the brutal repression of an anti-revolutionary movement, earning him the nickname "le mitrailleur (butcher) de Lyon". After serving Robespierre, Fouché engineered his overthrow and rose to Minister of Police under the Directory, which he then helped to overthrow before putting his network of informants in Napoleon’s service as his Minister of Police. After turning against the Emperor, Fouché served the new King Louis XVIII – whose brother he had helped send to the guillotine. Thus, Fouché served the Revolution, the Directory, the First Empire and the Restoration.