Von Kupffer also attacks the notion of a third sex, a concept he claims was invented by homosexual rights activists like Magnus Hirschfeld as a way to gain legal recognition for homosexuals and to repeal existing anti-sodomy laws. He is also strongly opposed to any revisionist history where historical figures like Alexander the Great or Julius Caesar are depicted as gays, when he feels the modern notion of "gay" hinges on a feminized, third-sex model of male behavior that he contends did not apply at the time.