What is the theme of Ender's Game? the theme needs to be more than one word
One could argue that the theme of Ender's Game is military ethics. Specifically, the breakdown of those ethics during wartime. Few things about Ender's military training can be called ethical. He's taken from his family, isolated from his peers, and manipulated by a man later tried for war crimes and child abuse. His training is passed off as a "game," subverting the innocence and simplicity of play for military means. Ender unwittingly exterminates an entire race because his trainers tell him he's merely playing a video game, not commanding military troops. He bears the guilt of this xenocide for the rest of his life.