As they had abandoned the concept of justice, there could be no rational standards of punishment. Penology took its place with lycanthropy and other forgotten witchcrafts. Yet, since it was not practical to permit a probable source of danger to remain in the community, social offenders were examined and potential repeaters were given their choice of psychological readjustment, or of having society withdraw itself from them—Coventry a large region of the United States surrounded by a force-field.