Light Yagami, the protagonist of the manga and anime series Death Note, rationalizes his actions by believing that his goal of creating a utopia where he is the ultimate arbiter of justice justifies the means he uses to achieve it. He sees himself as purging the world of criminals and wrongdoers, believing that sacrificing a few lives for the greater good will ultimately lead to a better society. This skewed sense of justice and his growing megalomania lead him to justify his increasingly extreme and unethical actions as necessary steps towards his vision of a perfect world.