Cardinal Richelieu is best known as the villain of The Three Musketeers, but the historical Armand Jean du Plessis reshaped France and the idea of the modern nation state. Trained for the military, he was pushed into the priesthood to keep the family bishopric of Luçon, talked the pope into an age dispensation, and turned a poor diocese into a laboratory for administrative reform.

This episode traces his rise from the Estates General of 1614 to exile, his return as mediator for Marie de’ Medici, and his survival on the Day of the Dupes. We examine how he dismantled the military power of the nobility, built a postal surveillance network, besieged La Rochelle, funded Protestant armies against the Habsburgs under raison d’état, and left a legacy that outlasted the public hatred toward him.

• Why Richelieu ordered the rounded table knife, and how he went from soldier in training to underage bishop
• The Day of the Dupes in 1630 and how he convinced Louis XIII to choose the state over his mother
• Tearing down noble castles, installing intendants, and the Cabinet Noir that read intercepted mail
• The siege of La Rochelle and the 14 kilometer seawall built to keep English ships out
• Raison d’état, New France, the Académie Française, the Cinq-Mars plot, and the strange fate of his head