Ordinary citizens of the United States who managed to survive the nuclear war and adapt to the radiation mutated into a clan-based warrior society known as the Mutes. Adopting a warrior ethos and tribal society similar to Native Americans, the Mutes are primitive, employing spears and knives in combat. Most are affected by a variety of radiation-induced infirmities, such as somewhat short-term memories and deformities varying in severity by individual. There are exceptions, Mutes with excellent recall who keep the tribe's traditions alive through an oral tradition of story-telling. These Mutes are known as 'wordsmiths'. The Mutes would not present a significant threat to the Federation's vastly superior technology and weapons except for the existence of Mutes known as 'seers', who can foresee their moves, and 'summoners', who can use magical forces that the Federation has no defence against. The Federation leadership does not publicly acknowledge the existence of Mute magic and outlaws all discussion of its existence, to the anger of front-line combat veterans, who have seen it in action.