Twenty Years After Dumas comes out on the side of the monarchy in general, or at least the text often praises the "idea" of benevolent royalty. His musketeers are valiant and just in their efforts to protect young Louis XIV and the doomed Charles I from their attackers. The action begins during the regency of Queen Anne of Austria (term 1643–1651), with Cardinal Mazarin as First Minister. D'Artagnan, who seemed to have a promising career ahead of him at the end of "The Three Musketeers", has for twenty years remained a lieutenant, and seems unlikely to progress despite his ambition and the debt
The Twenty Years' Crisis be acknowledged as a starting point. He concludes his discussion by suggesting that "elegant superstructures" such as the League of Nations "must wait until some progress has been made in digging the foundations". Since its publication, "The Twenty Years' Crisis" has been an essential book in the study of international relations. It is still commonly read in undergraduate courses, and the book is considered "one of the founding texts of classical realism". The book has served as the inspiration for numerous other works, such as "The Eighty Years' Crisis", a book written by the International Studies Association as a survey