The novel has received criticism for violence and its justification. Elaine Radford's review, "Ender and Hitler: Sympathy for the Superman", posits that Ender Wiggin is an intentional reference by Card to Adolf Hitler and criticizes the violence in the novel, particularly at the hands of the protagonist. Card responded to Radford's criticisms in "Fantasy Review", the same publication. Radford's criticisms are echoed in John Kessel's essay "Creating the Innocent Killer: Ender's Game, Intention, and Morality", wherein Kessel states: "Ender gets to strike out at his enemies and still remain morally clean. "Nothing" is his fault." Noah Berlatsky makes similar claims in his analysis of the relationship between colonization and science fiction, where he describes "Ender's Game" as in part a justification of "Western expansion and genocide".