The rivalry between Angier and Borden dominates the film. Obsession, secrecy, and sacrifice fuel the battle, as both magicians contribute their fair share to a deadly duel of one-upmanship, with disastrous results. Angier's obsession with beating Borden costs him Cutter's friendship, while providing him with a collection of his own dead clones; Borden's obsession with maintaining the secrecy of his twin leads Sarah to question their relationship, eventually resulting in her suicide when she suspects the truth. Angier and one of the twins both lose Olivia's love because of their inhumanity. Finally, Borden is hanged and the last copy of Angier shot. Their struggle is also expressed through class warfare: Borden as The Professor, a working-class magician who gets his hands dirty, versus Angier as The Great Danton, a classy, elitist showman whose accent makes him appear American.[25] Film critic Matt Brunson claimed that a complex theme of duality is exemplified by Angier and Borden, that the film chooses not to depict either magician as good or evil.[26]
Angier's theft of Borden's teleportation illusion in the film echoes many real-world examples of stolen tricks among magicians. Outside the film, similar rivalries include magicians John Nevil Maskelyne and Harry Kellar's dispute over a levitation illusion.[27] Gary Westfahl of Locus Online also notes a "new proclivity for mayhem" in the film over the novel, citing the murder/suicide disposition of Angier's duplicates and intensified violent acts of revenge and counter-revenge. This "relates to a more general alteration in the events and tone of the film" rather than significantly changing the underlying themes.[28]
Nor is this theme of cutthroat competition limited to sleight of hand: the script incorporates the popular notion that Nikola Tesla and Thomas Edison were directly engaged in the war of the currents, a rivalry over electrical standards, which appears in the film in parallel to Angier and Borden's competition for magical supremacy.[29][30] In the novel, Tesla and Edison serve as foils for Angier and Borden, respectively.[31]
Den Shewman of Creative Screenwriting says the film asks how far one would go to devote oneself to an art. The character of Chung Ling Soo, according to Shewman, is a metaphor for this theme.[11] Film critic Alex Manugian refers to this theme as the "meaning of commitment."[32]
Nicolas Rapold of Film Comment addresses the points raised by Shewman and Manugian in terms of the film's "refracted take on Romanticism":
Angier's technological solution—which suggests art as sacrifice, a phoenix-like death of the self—and Borden's more meat-and-potatoes form of stagecraft embody the divide between the artist and the social being.[33]
For Manugian the central theme is "obsession," but he also notes the supporting themes of the "nature of deceit" and "science as magic." Manugian criticizes the Nolans for trying to "ram too many themes into the story."[32]
