While in the valley, Dagny develops a romantic relationship with Galt, although it remains physically unconsummated – which is linked to her refusing to join the strike. After she returns home to New York, Galt takes over the airwaves, delivering a lengthy speech that explains what he sees to be the irrationality of collectivism and offers his own philosophy (Ayn Rand's Objectivism) as an alternative. Galt speaks against what he sees as the evil of collectivism and the idea that individuals must be responsible for each other, and says that should be replaced by voluntary association and adherence to rational self-interest. Seeking Galt after the speech, Dagny accidentally leads the authorities to him, and he is arrested. She and the strikers rescue Galt as the government tortures him. They return to Galt's Gulch and prepare to rebuild the rest of the world, as the collapse of the incompetent government nears.