Thought I'd share this here since I saw it come up on a Uhall topic: Twilight isn't the creator of the vampire vs. werewolf lore. Meyer happened to have used that lore in her books... and subsequently the movies, also the movies of Underworld/World of Darkness --- Vampires vs. Lycans --- used the same lore as well. It has been more evident in the scripts and literally writings of recent time however... There have been allusions to a battle between vampires and werewolves called the Trajanic Wars. In 101-102 and 105-106, there were two short wars between the Roman Empire during Trajan’s rule, and the Dacian kingdom, which had become a threat to the Empire. It was said that during that event the Dacian vampires betrayed the werewolves, which were their servants, to the Romans, and this unforgiveable act caused werewolves and vampires to become eternal enemies. Though the Trajanic War (also called the Dacian War) is a true part of history, the vampire and werewolf angle, of course, is only a myth.