History has produced many specimens of the banality of evil, but what about its flip side, what impels ordinary people to defy the sway of authority and convention? Through these dramatic stories of unlikely resisters, Eyal Press' shows that the boldest acts of dissent are often carried out not only by radicals seeking to overthrow the system but also by true believers who cling with unusual fierceness to their convictions. Drawing on groundbreaking research by moral psychologists and neuroscientists, this deeply reported work of narrative journalism examines the choices and dilemmas we all face when our principles collide with the loyalties we harbor and the duties we are expected to fulfill.