villains created by Poul Anderson and related authors. I do not want to repeat that analysis. However, it might be of interest to note that I have found an author who, I think, presents the most interesting succession of villains. In Ian Fleming's novels:
Bond discredits Le Chiffre, who is then assassinated by SMERSH;
Beria directs SMERSH;
G succeeds Beria;
Bond kills Mr. Big, Donovan Grant and Goldfinger and captures Rosa Klebb, all of SMERSH;
Bond meanwhile also fights the Russian-backed Nazi, Hugo Drax, and the Spangled Mob - the latter later joins Goldfinger's Hoods' Congress;
while recuperating from the SMERSH attempt to assassinate him, Bond eliminates the independent operator, Dr. No;
when Khruschev disbands the discredited SMERSH, some of its members join SPECTRE;
Bond defeats Largo and Uhlmann of SPECTRE and destroys the organization twice;
Bond kills the founder and director of SPECTRE, Blofeld;
because of the aftermath of his fight with Blofeld, Bond must kill Scaramanga to regain his position in the Secret Service;
the Mafia is represented in the Hoods' Congress, SPECTRE and Scaramanga's Group;
SPECTRE poaches men from the French equivalent of the Mafia, the Unione Corse, which then helps Bond against SPECTRE.
And I did not expect that list to grow so long.