 As a Pythagorean, or believer in "An Essay on Abstinence from Animal Food, as a Moral Duty" by Joseph Ritson, Mary Shelley saw Prometheus not as a hero but rather as something of a devil, and blamed him for bringing fire to man and thereby seducing the human race to the vice of eating meat.Percy wrote several essays on what became known as vegetarianism including "A Vindication of Natural Diet".The Titan in the Greek mythology of Prometheus parallels Victor Frankenstein.