
Several key themes of the novels, such as the rejection of religion and the abuse of power in a fictionalised version of the Catholic Church, were diluted in the adaptation. Director Weitz said "in the books the Magisterium is a version of the Catholic Church gone wildly astray from its roots," but that the organization portrayed in his film would not directly match that of Pullman's books. Instead, the Magisterium represents all dogmatic organization. Weitz said that New Line Cinema had feared the story's anti-religious themes would make the film financially unviable in the U.S., and so religion and God ("the Authority" in the books) would not be referenced directly.