The rebellion is ultimately unsuccessful, however. The World State's forces are too powerful, and the rebels are outnumbered and outgunned. John is captured and taken to the Controller's office, where he is confronted by Mustapha Mond, the World Controller's Assistant. Mond explains to John that the World State is a utopia, and that the citizens of the World State are happy and content. He argues that John's desire for freedom and individuality is a dangerous illusion, and that it would only lead to pain and suffering.
John is unconvinced by Mond's arguments, and he refuses to give up his belief in freedom. He is taken to the conditioning center, where he is subjected to a series of treatments designed to brainwash him and make him conform to the values of the World State. The treatments are successful, and John is eventually released from the conditioning center. He returns to the Savage Reservation, where he lives out the rest of his days as a solitary and isolated figure.
The ending of _Brave New World_ is a warning about the dangers of totalitarianism and social conformity. Huxley's novel shows how a society that values stability and order above all else can easily slip into tyranny. It also shows how individuals who value their freedom and individuality can be easily crushed by a powerful state.