Isolation In Ender's Game

In the novel, Ender’s Game written in 1977 by Orson Scott Card a futuristic story reveals the anguish during the struggle for survival. In chapter four to five, Ender faces the isolation, which is caused by Graff on purpose, however he has learned a lesson from Graff that in this world the one he can really rely on is himself. Later on he unfolds his progress that he modifies the isolated situation. As a result, Ender’s developing self-reliance is setting up his mind to be strong enough to face the difficulty in the future, but it does not interference building up his ability of cooperation.
In scene four, to make Ender understand his position, Graff gives his statement that “individual human beings are all tools, that the others use to help