Who were vagrants in 'the tripods'?

In John Christopher's "The Tripods" trilogy, vagrants are individuals who have rejected the control of the Tripods and the oppressive society they create. Often living on the fringes of society, vagrants resist the brainwashing and conformity enforced by the Tripods, embracing a nomadic lifestyle. They represent freedom and the struggle against tyranny, providing a contrast to the subservient populace that has accepted the Tripods' dominance. Their existence highlights themes of rebellion and the quest for autonomy in a controlled world.