Light initially becomes horrified at the Death Note's abilities after he tests the notebook on two criminals out of curiosity, but eventually convinces himself that the criminal's resulting deaths were justified. Light soon becomes driven to lead a personal crusade to rid the world of crime by using the notebook. While his agenda originates with good intentions, Light eventually finds himself killing law enforcement and even innocents in order to elude capture. His ethics are utilitarian, justifying the most extreme acts in service of his cause. He is also driven by a need for victory, which motivates most of his cruelest acts. Combined with the power of the Death Note, his hubris and genius-level intellect convince him that only he can save the world.